Life Science: November Paper 1 Medium
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Questions and Answers

What is the role of roots in the life of a plant?

  • Anchorage to the ground (correct)
  • Reproduction
  • Transpiration
  • Photosynthesis

Which layer of the dicotyledonous root features root hairs?

  • Endodermis
  • Stele
  • Cortex
  • Epidermis (correct)

What is the main function of the cortex in a dicotyledonous root?

  • Transport of water
  • Storage of nutrients (correct)
  • Production of seeds
  • Photosynthesis

Which structure in the cortex of a dicotyledonous root has a water-impermeable barrier?

<p>Endodermis (D)</p> Signup and view all the answers

Which part of the root includes the pericycle, phloem, cambium, and xylem?

<p>Stele (D)</p> Signup and view all the answers

In dicotyledonous plants, what type of root system is typically observed?

<p>Taproot system (C)</p> Signup and view all the answers

What is the function of the xylem in dicotyledonous plants?

<p>Transport water and minerals (A)</p> Signup and view all the answers

What is the main role of the cambium in dicotyledonous plants during secondary growth?

<p>Increasing girth and producing new vascular tissues (C)</p> Signup and view all the answers

Which part of the stem is located below the epidermis and may include collenchyma cells and parenchyma cells?

<p>Cortex (C)</p> Signup and view all the answers

What is the primary function of roots in plants?

<p>Translocation of water and nutrients (A)</p> Signup and view all the answers

Which root system is common in monocotyledons, forming a shallow, mat-like structure?

<p>Fibrous Root System (C)</p> Signup and view all the answers

If a dicotyledonous plant lacks the pericycle, what process might be impacted?

<p>Secondary growth of vascular tissues (A)</p> Signup and view all the answers

What is the main function of the pith in dicotyledonous stems?

<p>Storing nutrients and assisting in substance transport (A)</p> Signup and view all the answers

Which tissue in roots provides mechanical support and strength?

<p>Collenchyma and Sclerenchyma (B)</p> Signup and view all the answers

What does secondary growth in dicotyledonous plants lead to?

<p>Development of wood and bark (D)</p> Signup and view all the answers

What unique role do some modified roots like those of carrots play?

<p>Reproduction and generation of new plants (B)</p> Signup and view all the answers

What is the function of xylem in plants?

<p>Facilitating the upward transport of water and mineral salts from the roots to other plant parts (A)</p> Signup and view all the answers

Which layer of the dicotyledonous root features the Casparian strip regulating water flow?

<p>Endodermis (C)</p> Signup and view all the answers

What role does transpiration play in plant physiology?

<p>Regulating plant temperature (D)</p> Signup and view all the answers

What phenomenon facilitates the transpirational pull of water in plants?

<p>Capillary action (D)</p> Signup and view all the answers

How are dicotyledonous and monocotyledonous plants distinguished?

<p>By their stem anatomy and growth patterns (D)</p> Signup and view all the answers

What category do plants fall into if they have multiple woody stems growing from the base?

<p>Shrubs (D)</p> Signup and view all the answers

What is the primary function of stems in plants?

<p>Storing nutrients and water (C)</p> Signup and view all the answers

How does stem development begin in monocotyledonous plants?

<p>Starting with the coleorhiza and then the radicle (A)</p> Signup and view all the answers

Which tissues in dicotyledonous stems provide structural integrity and resilience?

<p>Support and strength tissues (A)</p> Signup and view all the answers

What is the critical primary function of the epidermis in dicotyledonous stems?

<p>Facilitate gas exchange (C)</p> Signup and view all the answers

What is the function of the cuticle on plant leaves?

<p>To minimize water loss by evaporation (D)</p> Signup and view all the answers

Which structure plays a crucial role in the absorption of water and minerals from the soil?

<p>Root hairs (D)</p> Signup and view all the answers

What is the function of the cork cambium in plants?

<p>To produce cork cells that form the bark (B)</p> Signup and view all the answers

In plants, what is the primary function of the pericycle?

<p>To strengthen the stem and protect vascular tissues (B)</p> Signup and view all the answers

Which pathway involves the movement of water through the cytoplasm of cells interconnected by plasmodesmata?

<p>Symplast pathway (D)</p> Signup and view all the answers

What does the Casparian strip do in the root?

<p>Acts as a barrier to force water to pass through cell membranes (C)</p> Signup and view all the answers

What contributes to the movement of water up through the xylem towards the leaves?

<p>Root pressure (C)</p> Signup and view all the answers

Which part of the plant primarily moves water and minerals up from the roots?

<p>Xylem (C)</p> Signup and view all the answers

What is the function of root hairs on plant roots?

<p>To aid in the absorption of water and minerals (A)</p> Signup and view all the answers

Where is the stomata primarily located in plants?

<p>On the surface of plant leaves (B)</p> Signup and view all the answers

Why do endoskeletons offer less protection from external threats compared to exoskeletons?

<p>They are composed of living tissues (D)</p> Signup and view all the answers

What is the primary function of the vertebral column in the human skeletal system?

<p>Encasing the spinal cord (A)</p> Signup and view all the answers

Which category of bones provides protection for internal organs and a broad surface for muscle attachment?

<p>Flat Bones (C)</p> Signup and view all the answers

How does the axial skeleton differ from the appendicular skeleton in humans?

<p>Axial skeleton supports limb movement (C)</p> Signup and view all the answers

What type of bones are crucial for large movements and act as levers in the human body?

<p>Long Bones (B)</p> Signup and view all the answers

Why are endoskeletons advantageous for supporting large body sizes?

<p>They allow continuous growth (B)</p> Signup and view all the answers

What is one crucial function of the pelvic girdle in the human skeletal system?

<p>Supporting the lower limbs (B)</p> Signup and view all the answers

How does the human endoskeleton overcome the limitation of moulting for growth?

<p>By being composed of living tissues (B)</p> Signup and view all the answers

What is one disadvantage of endoskeletons as highlighted in the text?

<p>Susceptibility to diseases (C)</p> Signup and view all the answers

Why do flat bones primarily protect internal organs in the human body?

<p>By providing a broad surface for muscle attachment (A)</p> Signup and view all the answers

What is the primary function of bones in the musculoskeletal system?

<p>Serving as attachment points for muscles (D)</p> Signup and view all the answers

Why is cartilage distinguished from other tissues?

<p>It contains blood vessels and nerves (D)</p> Signup and view all the answers

Which type of joint allows free movement in various directions?

<p>Synovial joints (C)</p> Signup and view all the answers

What do tendons connect in the musculoskeletal system?

<p>Bones to muscles (B)</p> Signup and view all the answers

What is the role of ligaments in the musculoskeletal system?

<p>Connecting bones to other bones (A)</p> Signup and view all the answers

Why do muscles operate in pairs known as antagonistic pairs?

<p>To control movement by contracting and relaxing (C)</p> Signup and view all the answers

What explains how various musculoskeletal structures work together to enable motion?

<p>Structural Connectivity (A)</p> Signup and view all the answers

Which system is crucial for providing structure to the body and facilitating movement?

<p>Musculoskeletal System (B)</p> Signup and view all the answers

How do bones facilitate locomotion in the body?

<p>By providing structural framework and support (B)</p> Signup and view all the answers

In the musculoskeletal system, what do joints primarily help connect?

<p>Bones to muscles (D)</p> Signup and view all the answers

What is the primary reason why organisms with hydrostatic skeletons must reside in moist or aquatic environments?

<p>To prevent dehydration of the hydrostatic cavity (D)</p> Signup and view all the answers

Which advantage of hydrostatic skeletons enables organisms like jellyfish to adapt their shape to environmental conditions?

<p>Flexibility (A)</p> Signup and view all the answers

Why do larger organisms with exoskeletons face challenges related to growth?

<p>Growth Limitation due to the need for moulting (B)</p> Signup and view all the answers

What feature of exoskeletons allows for a variety of physical adaptations in arthropods?

<p>Diversity in Physical Adaptations (B)</p> Signup and view all the answers

Why do hydrostatic skeletons require less energy for movement compared to other skeletal structures?

<p>Energy Efficiency (B)</p> Signup and view all the answers

In what way do exoskeletons hinder the agility of organisms possessing them?

<p>Weight Constraints (A)</p> Signup and view all the answers

What characteristic of hydrostatic skeletons provides faster recovery after sustaining damage?

<p>Rapid Healing (D)</p> Signup and view all the answers

Which type of skeletal structure requires moulting for accommodating growth, posing a challenge during that period?

<p>Exoskeletons (A)</p> Signup and view all the answers

How do exoskeletons aid in the movement of arthropods?

<p>Support for Muscular Attachment (B)</p> Signup and view all the answers

What unique feature of hydrostatic skeletons contributes to their adaptability for movement through narrow spaces?

<p>Flexibility (D)</p> Signup and view all the answers

What is the primary role of ligaments in joints?

<p>Connect bones within joints for stability (D)</p> Signup and view all the answers

How do tendons contribute to muscle function?

<p>Connect muscles to bones for movement precision (A)</p> Signup and view all the answers

What is the function of antagonistic muscles in joint movement?

<p>Work together in coordinated action for movement (B)</p> Signup and view all the answers

What is the hierarchical order from basic units to an entire muscle in the structure of skeletal muscle?

<p>Myofibrils &gt; Muscle Fibers &gt; Fascicles &gt; Muscle (D)</p> Signup and view all the answers

What is the function of cartilage at joints?

<p>Facilitate smooth bone articulation during movement (C)</p> Signup and view all the answers

What is the major component of synovial joints that aids in movement?

<p>Synovial fluid (D)</p> Signup and view all the answers

Which part of the muscle contains sarcomeres, the units responsible for contraction?

<p>Myofibrils (A)</p> Signup and view all the answers

What is the role of perimysium in muscle structure?

<p>Connect muscle fibers into fascicles (B)</p> Signup and view all the answers

How do actin and myosin filaments contribute to muscle contraction?

<p>Actin filaments shorten, and myosin filaments slide over them (B)</p> Signup and view all the answers

What distinguishes skeletal muscle from other muscle types in terms of voluntary control?

<p>Skeletal muscles are consciously controlled (A)</p> Signup and view all the answers

Which part of the dicotyledonous root has a water-impermeable barrier?

<p>Endodermis (D)</p> Signup and view all the answers

What is the primary function of the cortex in dicotyledonous roots?

<p>Nutrient storage (B)</p> Signup and view all the answers

In dicotyledonous plants, which structure is responsible for the movement of water towards the inner layers of the root?

<p>Cortex (C)</p> Signup and view all the answers

Which of the following plant parts is involved in absorption of water and minerals?

<p>Root hairs (D)</p> Signup and view all the answers

What type of root system is commonly observed in dicotyledonous plants?

<p>Taproot system (B)</p> Signup and view all the answers

Which layer of the dicotyledonous root includes the pericycle and vascular tissues?

<p>Stele (Vascular Cylinder) (D)</p> Signup and view all the answers

Which musculoskeletal tissue does not contain blood vessels or nerves?

<p>Cartilage (C)</p> Signup and view all the answers

What is the primary function of synovial joints in the musculoskeletal system?

<p>Provide flexibility (A)</p> Signup and view all the answers

Which part of the musculoskeletal system connects bones to other bones?

<p>Ligaments (A)</p> Signup and view all the answers

What is the microscopic structure found in bones that is crucial for nutrient and waste transport?

<p>Canaliculi (B)</p> Signup and view all the answers

Joints categorized as fibrous permit which type of movement?

<p>No movement (A)</p> Signup and view all the answers

Which musculoskeletal component plays a crucial role in distributing mechanical loads efficiently to avoid excessive stress?

<p>Bones (D)</p> Signup and view all the answers

What are tendons primarily responsible for in the musculoskeletal system?

<p>Connecting muscles to bones (D)</p> Signup and view all the answers

Which component of the musculoskeletal system provides support and flexibility at joints?

<p>Cartilage (B)</p> Signup and view all the answers

In the musculoskeletal system, what do ligaments connect bones to?

<p>Other bones (C)</p> Signup and view all the answers

What distinguishes synovial joints from fibrous joints?

<p>Range of motion (D)</p> Signup and view all the answers

What is the primary role of the Pericycle in a plant stem?

<p>Strengthening the stem (C)</p> Signup and view all the answers

In a plant, what is the function of the Vascular Cambium?

<p>Facilitating radial growth (C)</p> Signup and view all the answers

What is the primary purpose of Cork Cambium in perennial plants?

<p>Forming bark for protection (C)</p> Signup and view all the answers

Which pathway allows water to move across cell walls and spaces without crossing cell membranes?

<p>Apoplast Pathway (C)</p> Signup and view all the answers

What is the significance of the Casparian strip in the endodermis of roots?

<p>Blocking the Apoplast pathway (A)</p> Signup and view all the answers

Which process is responsible for pushing water from the roots up through the xylem in plants?

<p>Root Pressure (A)</p> Signup and view all the answers

What is the primary role of root hairs in a plant's root system?

<p>Increasing surface area for water uptake (C)</p> Signup and view all the answers

What is the primary function of the Cuticle in plant leaves?

<p>Reducing water loss (D)</p> Signup and view all the answers

Why is the Cortex important in plant stems?

<p>Mainly composed of cells for storage (D)</p> Signup and view all the answers

What is the role of the Pericycle in the stem of a plant?

<p>Strengthening the stem and protecting vascular tissues (A)</p> Signup and view all the answers

What is the primary role of the endodermis in dicotyledonous plant roots?

<p>Regulating water flow to the xylem and phloem (C)</p> Signup and view all the answers

Which layer in dicotyledonous roots contributes to lateral root growth and structural integrity?

<p>Pericycle (B)</p> Signup and view all the answers

What is the primary function of the cambium in dicotyledonous stems?

<p>Producing new xylem and phloem tissues (B)</p> Signup and view all the answers

What is the primary function of the exodermis in dicotyledonous plant roots?

<p>Providing structural integrity (B)</p> Signup and view all the answers

Which critical process is facilitated by transpiration in plants?

<p>Cooling and regulation of plant temperature (C)</p> Signup and view all the answers

Why is the pericycle in dicotyledonous roots essential for root structure and function?

<p>Assists in lateral root growth and structural integrity (B)</p> Signup and view all the answers

What is the function of the exodermis in dicotyledonous root structure?

<p>Providing shape, protection, and strength (B)</p> Signup and view all the answers

Which tissue layer in dicotyledonous plants regulates the movement of water to the xylem and phloem?

<p>Pericycle (B)</p> Signup and view all the answers

What is the main function of the cambium in dicotyledonous plant stems?

<p>Producing new xylem and phloem tissues (B)</p> Signup and view all the answers

Why is the epidermis an important layer in dicotyledonous stems?

<p>Maintains water balance in the plant (C)</p> Signup and view all the answers

What is the primary function of the vertebral column in humans?

<p>Protecting the spinal cord and providing structural integrity (D)</p> Signup and view all the answers

Why are long bones such as the femur important for large movements in the human body?

<p>To provide flexibility and support as levers for movement (C)</p> Signup and view all the answers

Which bones provide protection for internal organs and a broad surface for muscle attachment in the human skeleton?

<p>Flat bones like the sternum and scapula (B)</p> Signup and view all the answers

In the human body, what is the primary function of the pelvic girdle?

<p>Supporting the lower limbs (D)</p> Signup and view all the answers

Why is the rib cage considered important in the human body?

<p>To protect essential organs like the heart and lungs (A)</p> Signup and view all the answers

Which component of the human skeleton forms the central axis of the body and is essential for protecting vital internal organs?

<p>Axial Skeleton (B)</p> Signup and view all the answers

What do the cervical vertebrae primarily contribute to in the human body?

<p>Forming the neck region (A)</p> Signup and view all the answers

Which type of bones are carpals in the wrist and tarsals in the ankles, providing stability and supporting slight movements?

<p>Short Bones (A)</p> Signup and view all the answers

How do flat bones like the scapula and sternum primarily contribute to the human skeleton?

<p>Protecting internal organs and providing muscle attachment surfaces (C)</p> Signup and view all the answers

Which category of bones, such as vertebrae and mandible, features complex shapes with specific functions in the human body?

<p>Irregular Bones (A)</p> Signup and view all the answers

What is the main function of the epidermis in the stem of dicotyledonous plants?

<p>Prevents water loss (A)</p> Signup and view all the answers

What connects muscles to bones in the human body?

<p>Tendons (D)</p> Signup and view all the answers

What is the primary role of the pericycle in the stem's vascular cylinder of dicotyledonous plants?

<p>Contributes to secondary vascular tissue formation (C)</p> Signup and view all the answers

Which tissue in the stem helps in the transport of substances across dicotyledonous plants?

<p>Pith (A)</p> Signup and view all the answers

What is the primary function of ligaments in the musculoskeletal system?

<p>Prevent excessive joint movements (D)</p> Signup and view all the answers

What type of root system is common in monocotyledonous plants?

<p>Fibrous root system (A)</p> Signup and view all the answers

In skeletal muscle, what is the basic unit that is responsible for muscle contraction?

<p>Myofibrils (D)</p> Signup and view all the answers

Which type of muscle is consciously controlled to perform various actions like running?

<p>Skeletal muscle (A)</p> Signup and view all the answers

How does secondary growth in dicotyledonous plants primarily affect the stem?

<p>Leads to the formation of wood and bark (B)</p> Signup and view all the answers

Which critical function do roots serve in dicotyledonous plants during adverse conditions?

<p>Nutrient storage (A)</p> Signup and view all the answers

What role do antagonistic muscles play in moving bones at joints?

<p>Both muscles contract simultaneously (A)</p> Signup and view all the answers

Which connective tissue forms the joint capsule and helps connect and protect bones within a joint?

<p>Cartilage (A)</p> Signup and view all the answers

What tissue in roots provides mechanical support and strength?

<p>Sclerenchyma (D)</p> Signup and view all the answers

During muscle contraction, which protein filaments slide over each other to shorten the sarcomere?

<p>Actin and myosin (D)</p> Signup and view all the answers

Which part of the stem plays a significant role in the transport of water and minerals up from the roots?

<p>Vascular cylinder (A)</p> Signup and view all the answers

What is the main function of fascicles in skeletal muscle?

<p>Group muscle fibers together (D)</p> Signup and view all the answers

In dicotyledonous plants, what is the main function of the cambium layer in the stem?

<p>Produces new phloem and xylem (A)</p> Signup and view all the answers

What determines the origin of root systems in plants?

<p>Radicle of the plant embryo (C)</p> Signup and view all the answers

Which tissue acts as a cushion to distribute loads evenly across joints, preventing bone damage?

<p>Cartilage (B)</p> Signup and view all the answers

What is the primary role of synovial fluid in joints?

<p>Reduce friction for smooth movement (B)</p> Signup and view all the answers

Which type of skeleton is characterized by a fluid-filled cavity surrounded by muscles?

<p>Hydrostatic skeleton (C)</p> Signup and view all the answers

What is a disadvantage of hydrostatic skeletons compared to exoskeletons?

<p>Growth Limitation (D)</p> Signup and view all the answers

In what type of environment must organisms with hydrostatic skeletons reside to prevent desiccation?

<p>Moist or aquatic (B)</p> Signup and view all the answers

What advantage do exoskeletons provide that hydrostatic skeletons lack?

<p>Protection and support against physical damage (D)</p> Signup and view all the answers

Which type of skeleton requires moulting to accommodate growth?

<p>Exoskeleton (D)</p> Signup and view all the answers

What characteristic allows hydrostatic skeletons to adapt their shape to environmental conditions?

<p>Flexibility (A)</p> Signup and view all the answers

Why can exoskeletons support a variety of physical adaptations in arthropods?

<p>Variety in Physical Adaptations (A)</p> Signup and view all the answers

What is the disadvantage of exoskeletons due to larger size and weight?

<p>Growth Limitation (C)</p> Signup and view all the answers

Which aspect of hydrostatic skeletons contributes to faster recovery from damage?

<p>Rapid Healing (D)</p> Signup and view all the answers

Why are larger exoskeletons challenging for arthropods?

<p>Weight Constraints (D)</p> Signup and view all the answers

During which phase of the cell cycle are cellular contents, excluding the chromosomes, duplicated?

<p>G1 Phase (C)</p> Signup and view all the answers

Which phase occurs when each chromosome is duplicated by the cell?

<p>Synthesis Phase (D)</p> Signup and view all the answers

What phase of the cell cycle allows the cell to continue to grow and produce new proteins?

<p>Prophase (D)</p> Signup and view all the answers

What is the condition of DNA during the G2 Phase of the cell cycle?

<p>Loosely packed throughout the nucleus (A)</p> Signup and view all the answers

Which phase of the cell cycle prepares the cell for division and concludes with the cell ready to enter mitosis?

<p>G2 Phase (A)</p> Signup and view all the answers

What phase occurs when the chromosomes only condense into distinct forms during mitosis?

<p>Prophase (C)</p> Signup and view all the answers

Why is maintaining an effective surface area to volume ratio crucial for a cell?

<p>To decrease the cell's efficiency in managing material exchange. (B)</p> Signup and view all the answers

What is the primary purpose of Interphase in the cell cycle?

<p>To prepare for cell division. (C)</p> Signup and view all the answers

In which phase of mitosis do chromatids split at the centromere?

<p>Anaphase (A)</p> Signup and view all the answers

Where is mitosis typically observed in plants?

<p>Apical meristem and lateral meristem (D)</p> Signup and view all the answers

What distinguishes mitosis in plant cells from animal cells?

<p>Lack of centrosomes (C)</p> Signup and view all the answers

During which phase of mitosis does the cell membrane start to constrict?

<p>Telophase (A)</p> Signup and view all the answers

What happens to chromosomes in Telophase of mitosis?

<p>They begin to de-condense. (C)</p> Signup and view all the answers

Where does Mitosis occur in animals for blood cell production?

<p>Bone marrow (A)</p> Signup and view all the answers

In plant cells, what structure is absent during Mitosis but still leads to spindle formation?

<p>Centrosomes (C)</p> Signup and view all the answers

Why is Mitosis essential for growth, repair, and reproduction across various life forms?

<p>To maintain tissue integrity and function. (C)</p> Signup and view all the answers

Which type of cancer primarily emerges from the blood, lymphatic, and immune systems?

<p>Leukemia (B)</p> Signup and view all the answers

What critical characteristic of cancer cells enables them to invade other tissues and spread throughout the body?

<p>Metastasis (A)</p> Signup and view all the answers

Which scientific field benefits significantly from understanding mitosis for insights into cancer research?

<p>Developmental biology (A)</p> Signup and view all the answers

In which phase of the cell cycle does a cell plate form at the equator instead of membrane constriction in plant cells?

<p>Telophase (B)</p> Signup and view all the answers

What can trigger the development of cancer by damaging DNA and disrupting cellular regulation?

<p>Inherited genetic mutations (C)</p> Signup and view all the answers

What is a common misconception about cancer where it is viewed as an inevitable death sentence?

<p>Fatalism (B)</p> Signup and view all the answers

Which type of tumor impacts surrounding normal cells by compressing them, depriving them of nutrients, and disrupting their function?

<p>Malignant tumors (C)</p> Signup and view all the answers

What is a characteristic of cells that disregard growth inhibition signals and continue to multiply, unlike normal cells?

<p>Unresponsive to growth inhibition signals (D)</p> Signup and view all the answers

Which category of bones features complex shapes and specific functions, such as vertebrae and mandible?

<p>Irregular bones (D)</p> Signup and view all the answers

What is a common treatment for cancer that employs radiation to destroy cancer cells?

<p>Radiotherapy (C)</p> Signup and view all the answers

What is the primary function of dermal tissue in plants?

<p>Water and transpiration management (B)</p> Signup and view all the answers

Where are meristematic tissues primarily found in plants?

<p>Both roots and shoots (B)</p> Signup and view all the answers

Which type of tissues in plants undergo continuous division to contribute to plant growth?

<p>Meristematic tissues (A)</p> Signup and view all the answers

What is the distinguishing characteristic of cells in meristematic tissues?

<p>High vacuole content (A)</p> Signup and view all the answers

What is the primary function of permanent tissues in plants?

<p>Physical support (A)</p> Signup and view all the answers

What adaptation helps dermal tissues reduce water loss in plants?

<p>Presence of cuticle (D)</p> Signup and view all the answers

Which plant tissue category is responsible for plant growth?

<p>Meristematic tissue (D)</p> Signup and view all the answers

Where are lateral meristems typically found in plants?

<p>Tips of roots and shoots (D)</p> Signup and view all the answers

What is the primary role of meristematic tissue in plant development?

<p>Cell division for growth (D)</p> Signup and view all the answers

What is the primary purpose of the cuticle found in dermal tissues of plants?

<p>Reduce water loss (B)</p> Signup and view all the answers

What is the primary function of Schwann cells in nerve tissue?

<p>Insulate axons and enhance signal transmission (A)</p> Signup and view all the answers

Which type of neurons primarily carry messages from sensory receptors to the CNS?

<p>Unipolar neurons (C)</p> Signup and view all the answers

In the Peripheral Nervous System, which division controls involuntary responses?

<p>Autonomic nervous system (B)</p> Signup and view all the answers

What is the main role of interneurons in nerve tissue?

<p>Facilitate communication between sensory and motor neurons (C)</p> Signup and view all the answers

Which nervous system division is responsible for controlling voluntary movements?

<p>Somatic nervous system (C)</p> Signup and view all the answers

What is the primary function of the brain in the Central Nervous System?

<p>Coordinate bodily functions (A)</p> Signup and view all the answers

Which cells are specialized to transmit nerve impulses in nerve tissue?

<p>Neurons (C)</p> Signup and view all the answers

What is the main role of the spinal cord in the Central Nervous System?

<p>Conduit for signals between the brain and the body (D)</p> Signup and view all the answers

Which nerves extend from the brain and spinal cord to other parts of the body in the Peripheral Nervous System?

<p>Cranial nerves (D)</p> Signup and view all the answers

What is the primary function of axons in neurons?

<p>Transmit impulses away (B)</p> Signup and view all the answers

What is the primary function of Parenchyma cells in plants?

<p>Storage, photosynthesis, and injury repair (D)</p> Signup and view all the answers

Which type of tissue in plants is characterized by cells with thick lignified walls for rigidity and support?

<p>Sclerenchyma (B)</p> Signup and view all the answers

What distinguishes Xylem cells from Phloem cells in plants?

<p>Xylem cells are dead at maturity (C)</p> Signup and view all the answers

Which type of epithelial tissue is specialized in absorption and secretion, and is commonly found in glandular tissues?

<p>Cuboidal Epithelium (C)</p> Signup and view all the answers

In muscle tissue, which type is primarily responsible for regulating movements like peristalsis and blood flow?

<p>Smooth Muscle (C)</p> Signup and view all the answers

What is the main function of Loose Connective Tissue (Areolar) in the body?

<p>Cushions and supports organs (D)</p> Signup and view all the answers

Which type of connective tissue is responsible for storing fat and providing insulation and energy reserves?

<p>Adipose Tissue (C)</p> Signup and view all the answers

What role do Embryonic Stem Cells play in an organism's development?

<p>Contributing to the formation of specialized tissues (D)</p> Signup and view all the answers

Which type of muscle tissue is voluntary and moves bones and other structures?

<p>Skeletal Muscle (B)</p> Signup and view all the answers

What distinguishes Adult Stem Cells in organisms?

<p>Replacing old and damaged cells (A)</p> Signup and view all the answers

What is the main purpose of interphase in the cell cycle?

<p>Preparing for division (D)</p> Signup and view all the answers

During which sub-phase of interphase are cellular contents, excluding the chromosomes, duplicated?

<p>G1 Phase (A)</p> Signup and view all the answers

What happens during the S Phase (Synthesis Phase) in interphase?

<p>Chromosome duplication (B)</p> Signup and view all the answers

Why do chromosomes only condense into more distinct forms during the prophase of mitosis?

<p>To ensure proper cell division (C)</p> Signup and view all the answers

What factor is crucial in determining when a cell will divide?

<p>Surface area to volume ratio (B)</p> Signup and view all the answers

What does interphase allow the cell to do before entering mitosis?

<p>Grow and produce new proteins (D)</p> Signup and view all the answers

What happens to a cell as it grows in relation to its surface area and volume?

<p>Volume increases faster than surface area. (A)</p> Signup and view all the answers

Why does a cell become inefficient at managing material exchange with its environment?

<p>Decreased surface area to volume ratio. (C)</p> Signup and view all the answers

What is the primary purpose of interphase in the cell cycle?

<p>DNA replication. (D)</p> Signup and view all the answers

During which phase do chromatids separate and move to opposite poles of the cell?

<p>Anaphase. (B)</p> Signup and view all the answers

Where is mitotic activity most prominent in animal cells for processes like blood cell production?

<p>Basal layers of the skin. (A)</p> Signup and view all the answers

What distinguishes mitosis in plant cells from animal cells concerning the spindle apparatus?

<p>Absence of centrioles. (B)</p> Signup and view all the answers

What key process initiates during Telophase of mitosis in animal cells?

<p>Cell Division Begins. (C)</p> Signup and view all the answers

In which phase do chromosomes align at the equator of the cell in both animal and plant cells?

<p>Metaphase. (C)</p> Signup and view all the answers

What is the main function of mitosis in multicellular organisms?

<p>Growth and repair. (D)</p> Signup and view all the answers

Where is mitosis primarily observed in plants for growth and development?

<p>Meristem regions. (C)</p> Signup and view all the answers

What is one of the main characteristics of cancer cells mentioned in the text?

<p>Metastasis (B)</p> Signup and view all the answers

Which type of cancer originates in connective tissues such as bone, cartilage, and muscle?

<p>Sarcomas (D)</p> Signup and view all the answers

What is the primary function of chemotherapy in cancer treatment?

<p>Kill cancer cells by targeting rapid division (B)</p> Signup and view all the answers

What is a significant difference in mitosis between plant and animal cells?

<p>Cytokinesis mechanism (B)</p> Signup and view all the answers

Which component of the musculoskeletal system is particularly affected by chemotherapy?

<p>Muscles (C)</p> Signup and view all the answers

What is the primary function of meristematic tissue in plants?

<p>To continually divide and contribute to plant growth (A)</p> Signup and view all the answers

Which type of cancer significantly impacts the blood, lymphatic, and immune systems?

<p>Leukemia (A)</p> Signup and view all the answers

What is a key characteristic of cancer cells regarding growth inhibition signals?

<p>Continuous division despite signals (B)</p> Signup and view all the answers

Why do plant dermal tissues have a waxy layer called the cuticle?

<p>To protect the plant from external factors and reduce water loss (D)</p> Signup and view all the answers

What is the main function of the epidermal layer in plant tissues?

<p>To protect the plant from external factors (B)</p> Signup and view all the answers

Which of the following is a major concern regarding cancer based on the text?

<p>Normal tissue compression (A)</p> Signup and view all the answers

How do cancer cells differ from normal cells in response to biochemical signals?

<p>Cancer cells ignore certain signals (B)</p> Signup and view all the answers

Which tissue plays a role in plant growth by contributing to thickness growth?

<p>Meristematic tissue (B)</p> Signup and view all the answers

What is a key feature that distinguishes carcinomas from other types of cancer in the text?

<p>Arising in epithelial cells (B)</p> Signup and view all the answers

Why do plant root hairs and trichomes increase the surface area?

<p>To enhance water and nutrient absorption (A)</p> Signup and view all the answers

What differentiates meristematic tissues from permanent tissues in plants?

<p>Meristematic tissues do not generally divide (B)</p> Signup and view all the answers

How do dermal tissues in plants contribute to reducing water loss?

<p>By having a waxy layer on aerial parts (C)</p> Signup and view all the answers

What is the primary role of lateral meristems in plants?

<p>To contribute to thickness growth (D)</p> Signup and view all the answers

Why are root hairs essential for plant survival?

<p>To enhance water and mineral absorption (A)</p> Signup and view all the answers

What process do root hairs primarily facilitate in plants?

<p>Nutrient absorption (C)</p> Signup and view all the answers

What is the primary function of connective tissue?

<p>Supporting, binding, and protecting other tissues and organs (C)</p> Signup and view all the answers

What distinguishes cardiac muscle from skeletal muscle?

<p>Function in supporting blood circulation (C)</p> Signup and view all the answers

What is the key characteristic of xylem cells?

<p>Thick lignified walls (B)</p> Signup and view all the answers

What is the role of epithelial tissue in the body?

<p>Serving as a protective layer (D)</p> Signup and view all the answers

What differentiates smooth muscle from cardiac muscle?

<p>Location in hollow organs (D)</p> Signup and view all the answers

What is the main function of sclerenchyma in plants?

<p>Provision of rigidity and strength (D)</p> Signup and view all the answers

What is the distinguishing feature of skeletal muscle?

<p>Striations (B)</p> Signup and view all the answers

Which type of tissue is responsible for storing fat and providing insulation in the body?

<p>Adipose tissue (B)</p> Signup and view all the answers

Why are parenchymal cells important in plants?

<p>For storage, photosynthesis, and injury repair (C)</p> Signup and view all the answers

What is the main function of phloem in a plant?

<p>Transporting photosynthetic products (B)</p> Signup and view all the answers

What is the primary function of unipolar neurons?

<p>Carry messages from sensory receptors to the CNS (A)</p> Signup and view all the answers

Which nervous system division controls involuntary responses?

<p>Autonomic nervous system (C)</p> Signup and view all the answers

What is the role of dendrites in neurons?

<p>Receive impulses from other neurons (C)</p> Signup and view all the answers

How do Schwann cells contribute to nerve function?

<p>Insulate axons and enhance signal transmission (D)</p> Signup and view all the answers

Which system acts as a conduit for signals between the brain and the body?

<p>Central nervous system (C)</p> Signup and view all the answers

What is the primary function of axons in neurons?

<p>Transmit impulses away from the neuron cell body (A)</p> Signup and view all the answers

How do sensory neurons differ from motor neurons?

<p>Sensory neurons transmit sensory information, while motor neurons control muscle movements (A)</p> Signup and view all the answers

What is the main function of the brain within the Central Nervous System?

<p>Interpreting sensory information and coordinating bodily functions (D)</p> Signup and view all the answers

How do interneurons contribute to the nervous system?

<p>Facilitate communication between sensory and motor neurons (A)</p> Signup and view all the answers

Which type of neuron is predominantly involved in transmitting information from sensory receptors to the CNS?

<p>Unipolar neurons (C)</p> Signup and view all the answers

What is the main function of the Casparian strip in dicotyledonous roots?

<p>Prevents uncontrolled water entry into the vascular cylinder (B)</p> Signup and view all the answers

Which layer of a dicotyledonous root primarily consists of parenchyma cells?

<p>Endodermis (B)</p> Signup and view all the answers

How does the cortex of dicotyledonous roots differ from the endodermis?

<p>Cortex plays a role in nutrient storage while endodermis facilitates movement of water (D)</p> Signup and view all the answers

Which part of dicotyledonous plants demonstrates the taproot system?

<p>Roots (A)</p> Signup and view all the answers

What is the primary role of root hairs in dicotyledonous root systems?

<p>Enhance water and mineral absorption (C)</p> Signup and view all the answers

Which layer in the dicotyledonous root system is responsible for giving rise to lateral roots?

<p>Stele (B)</p> Signup and view all the answers

What is the primary function of the xylem in dicotyledonous plants?

<p>Transporting water and minerals (C)</p> Signup and view all the answers

Which tissue in plant roots provides mechanical support and strength?

<p>Collenchyma and Sclerenchyma (B)</p> Signup and view all the answers

What is the primary role of the cambium in dicotyledonous plant stems?

<p>Producing new phloem and xylem (C)</p> Signup and view all the answers

Which part of the stem of a dicotyledonous plant is composed of parenchyma cells that help in the transport of substances?

<p>Pith (A)</p> Signup and view all the answers

What is the main function of the epidermis in the stem of dicotyledonous plants?

<p>Preventing water loss (B)</p> Signup and view all the answers

In the root system of dicotyledonous plants, what structure sometimes contributes to the formation of secondary vascular tissues?

<p>Pericycle (C)</p> Signup and view all the answers

Which layer in dicotyledonous roots regulates water flow to the xylem and phloem?

<p>Endodermis (A)</p> Signup and view all the answers

Which primary function is NOT associated with root systems in plants?

<p>Transporting sugars (D)</p> Signup and view all the answers

What does the cambium in dicotyledonous stems primarily produce?

<p>New xylem and phloem tissues (D)</p> Signup and view all the answers

What distinguishes the tap root system from the fibrous root system?

<p>Absence of a main tap root (B)</p> Signup and view all the answers

Which part of the dicotyledonous plant stem contributes to the formation of secondary growth?

<p>Cambium (D)</p> Signup and view all the answers

Which structure is vital for the transpirational pull in plants?

<p>Capillary action (A)</p> Signup and view all the answers

What is the main function of the pith in a dicotyledonous plant's stem?

<p>Storing nutrients (C)</p> Signup and view all the answers

In dicotyledonous stems, what contributes to structural integrity and resilience?

<p>Sclerenchyma (C)</p> Signup and view all the answers

Which of the following is a common function of plant stems?

<p>Reproduction (A)</p> Signup and view all the answers

What do vines primarily use their stems for?

<p>Support and climbing (D)</p> Signup and view all the answers

Which tissue located in dicotyledonous stems is essential for the distribution of nutrients and water?

<p>Vascular bundles (D)</p> Signup and view all the answers

What is the primary function of the pericycle in dicotyledonous roots?

<p>Structural integrity and lateral root growth (B)</p> Signup and view all the answers

Where does the stem tissue called cambium produce new tissues in dicotyledonous plants?

<p>Between the xylem and phloem (D)</p> Signup and view all the answers

Which plant growth form is typically under 1 meter in height with multiple woody stems at the base?

<p>Shrubs (D)</p> Signup and view all the answers

What is the primary function of the Cortex in stems?

<p>Stores nutrients (B)</p> Signup and view all the answers

Which tissue regulates water and nutrient movement into the vascular bundles in plant stems?

<p>Endodermis (C)</p> Signup and view all the answers

What is the main role of the Vascular Cambium in stem anatomy?

<p>Facilitates radial growth of tissues (B)</p> Signup and view all the answers

Which structure develops from the outer cortex and replaces the epidermis to provide additional protection and support in perennial plants?

<p>Cork Cambium (B)</p> Signup and view all the answers

What do annual rings in the cross-section of woody stems indicate?

<p>Age of the plant (C)</p> Signup and view all the answers

What is the primary site for water absorption in plants?

<p>Root Hairs (A)</p> Signup and view all the answers

How does water primarily move through the endodermis into the stele of roots?

<p>Symplast Pathway (C)</p> Signup and view all the answers

What process ensures that all water and dissolved substances reaching the vascular cylinder must pass through a cell membrane in plant roots?

<p>Casparian strip barrier (C)</p> Signup and view all the answers

What is the process essential for moving water and minerals from roots to leaves in plants?

<p>Translocation (B)</p> Signup and view all the answers

Which mechanism helps push water up through the xylem towards the leaves in plants?

<p>Root Pressure (D)</p> Signup and view all the answers

What distinguishes hydrostatic skeletons from endoskeletons?

<p>Lack of Rigid Support (B)</p> Signup and view all the answers

In which organisms are hydrostatic skeletons typically found?

<p>Earthworms and Starfish (C)</p> Signup and view all the answers

What is the primary function of exoskeletons in arthropods like insects and crustaceans?

<p>Protection for Muscular Attachment (B)</p> Signup and view all the answers

Which characteristic makes hydrostatic skeletons energy-efficient for movement?

<p>Flexible Adjustment to Environment (A)</p> Signup and view all the answers

Why do organisms with hydrostatic skeletons need to reside in moist or aquatic environments?

<p>To Prevent Dehydration (B)</p> Signup and view all the answers

Which type of skeleton provides faster recovery from damage due to its structure?

<p>Hydrostatic Skeletons (D)</p> Signup and view all the answers

What is a notable disadvantage associated with exoskeletons?

<p>Growth Limitation (D)</p> Signup and view all the answers

Which feature of exoskeletons allows for diverse physical adaptations in arthropods?

<p>Support for Muscular Attachment (A)</p> Signup and view all the answers

Why do hydrostatic skeletons offer less protection compared to exoskeletons?

<p>Lack of Rigid Support (D)</p> Signup and view all the answers

What critical environmental factor limits the mobility and size of organisms with hydrostatic skeletons?

<p>Moisture Content (B)</p> Signup and view all the answers

Why might endoskeletons be more vulnerable to diseases compared to exoskeletons?

<p>Endoskeletons are made of living tissues (C)</p> Signup and view all the answers

What function do flat bones like the sternum serve in the human body?

<p>Protect internal organs (A)</p> Signup and view all the answers

Why is the vertebral column essential for the human body?

<p>It houses the spinal cord and protects internal organs (C)</p> Signup and view all the answers

Which bones are categorized as short bones and contribute to providing stability and support during slight movements?

<p>Carpals in the wrists (D)</p> Signup and view all the answers

What main purpose does the rib cage serve in the human body?

<p>Protect the heart and lungs (A)</p> Signup and view all the answers

What is the role of the pelvic girdle in the human skeleton?

<p>Support the lower limbs (C)</p> Signup and view all the answers

How do long bones like the femur contribute to human movement?

<p>Act as levers for large movements (B)</p> Signup and view all the answers

Why are irregular bones like the vertebrae and mandible considered unique in the human skeleton?

<p>They fulfill specific functions with complex shapes (C)</p> Signup and view all the answers

What is the primary function of the pectoral girdle in the human skeleton?

<p>Support the upper limbs (A)</p> Signup and view all the answers

Which bones are crucial for providing protection for internal organs and offering a broad surface for muscle attachment?

<p>Flat Bones (D)</p> Signup and view all the answers

What is the primary function of the Haversian system within bones?

<p>Facilitates nutrient and waste transport (D)</p> Signup and view all the answers

In the musculoskeletal system, which tissues are primarily responsible for providing support at joints?

<p>Cartilage (B)</p> Signup and view all the answers

What distinguishes synovial joints from other types of joints in terms of movement capabilities?

<p>They enable free movement in various directions (D)</p> Signup and view all the answers

What is the primary role of tendons in the musculoskeletal system?

<p>Connect bones to muscles (B)</p> Signup and view all the answers

What are Haversian canals surrounded by, forming the microscopic structure within bones?

<p>Collagen fibers (A)</p> Signup and view all the answers

Which term describes the connective tissue that provides joint stability by connecting bones to other bones?

<p>Ligaments (B)</p> Signup and view all the answers

What is the distinguishing characteristic of cartilage in terms of nerve and blood supply?

<p>Lacks blood vessels or nerves (A)</p> Signup and view all the answers

Which component of the musculoskeletal system primarily plays a role in transferring force from muscle contractions to bones for movement?

<p>Tendons (D)</p> Signup and view all the answers

What is the primary function of muscles operating in antagonistic pairs in controlling movement?

<p>Control movement by contracting and relaxing (C)</p> Signup and view all the answers

Which skeletal tissue component provides hardness and flexibility to bones through mineral salts and collagen fibers?

<p>Cartilage (B)</p> Signup and view all the answers

What is the primary function of ligaments in joints?

<p>Provide stability and prevent excessive joint movements (C)</p> Signup and view all the answers

How do tendons contribute to locomotion efficiency, especially during activities like running?

<p>Reduce the workload on muscles by storing and releasing energy (B)</p> Signup and view all the answers

What is the primary role of antagonistic muscles?

<p>Work together to create smooth and controlled movements (D)</p> Signup and view all the answers

Why is cartilage essential in joints?

<p>To reduce friction and cushion bone ends (A)</p> Signup and view all the answers

What is the primary function of myofibrils in muscle tissue?

<p>Facilitate muscle contraction (C)</p> Signup and view all the answers

How do actin and myosin filaments interact during muscle contraction?

<p>Myosin filaments slide over actin filaments (D)</p> Signup and view all the answers

What is the hierarchical structure of skeletal muscles?

<p>Fascicles, myofibrils, muscle fibers, muscles (A)</p> Signup and view all the answers

Why are fascicles important in skeletal muscles?

<p>Group muscle fibers together for coordinated movement (D)</p> Signup and view all the answers

What is the key role of perimysium in muscle structure?

<p>Surround and support muscle fascicles (C)</p> Signup and view all the answers

How do actin and myosin filaments contribute to muscle contraction?

<p>Myosin filaments slide over actin filaments shortening the sarcomere (A)</p> Signup and view all the answers

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