Podcast
Questions and Answers
What is the primary function of root apical meristem?
What is the primary function of root apical meristem?
- Growth in width of roots
- Increase in length of shoot and root (correct)
- Formation of secondary phloem
- Protection of root from soil damage
Where are intercalary meristems typically located in a plant?
Where are intercalary meristems typically located in a plant?
- At the tip of roots
- Within the flower structures
- At the base of leaves or internodes (correct)
- Along the stems only
What impact would the removal of the root cap have on the root tip?
What impact would the removal of the root cap have on the root tip?
- Faster nutrient absorption
- Increased susceptibility to damage (correct)
- Enhanced root growth
- Decreased root length
What would likely happen if the tip of a sugarcane plant is removed?
What would likely happen if the tip of a sugarcane plant is removed?
Which type of meristem is responsible for secondary growth in plants?
Which type of meristem is responsible for secondary growth in plants?
What do both vascular cambium and cork cambium produce?
What do both vascular cambium and cork cambium produce?
What is the primary role of intercalary meristem in plants like grasses?
What is the primary role of intercalary meristem in plants like grasses?
How does the presence of intercalary meristem benefit plants such as bamboo?
How does the presence of intercalary meristem benefit plants such as bamboo?
What is the primary function of collenchyma in plants?
What is the primary function of collenchyma in plants?
What distinguishes sclerenchyma cells from collenchyma cells?
What distinguishes sclerenchyma cells from collenchyma cells?
Which component primarily contributes to the hardening of sclerenchyma cell walls?
Which component primarily contributes to the hardening of sclerenchyma cell walls?
What characteristic of collenchyma contributes to its ability to provide flexibility in plants?
What characteristic of collenchyma contributes to its ability to provide flexibility in plants?
Which of the following is NOT a function of collenchyma?
Which of the following is NOT a function of collenchyma?
Why are sclerenchyma cells considered dead?
Why are sclerenchyma cells considered dead?
Which type of plant cells allows easy bending without breaking, particularly in climbers?
Which type of plant cells allows easy bending without breaking, particularly in climbers?
What is the structural composition of sclerenchyma cells?
What is the structural composition of sclerenchyma cells?
What happens to the nucleus of each sieve tube at maturity?
What happens to the nucleus of each sieve tube at maturity?
What role do companion cells play in the phloem?
What role do companion cells play in the phloem?
Which type of cells make up phloem fibres, and what is their state at maturity?
Which type of cells make up phloem fibres, and what is their state at maturity?
What type of materials do phloem parenchyma store?
What type of materials do phloem parenchyma store?
How does the phloem function in transporting food materials?
How does the phloem function in transporting food materials?
What distinguishes companion cells from sieve tube elements?
What distinguishes companion cells from sieve tube elements?
Which of the following statements about phloem is false?
Which of the following statements about phloem is false?
Which of the following best describes phloem parenchyma?
Which of the following best describes phloem parenchyma?
What is the primary function of blood in the body?
What is the primary function of blood in the body?
Which component constitutes the liquid matrix of blood?
Which component constitutes the liquid matrix of blood?
Which type of blood cell is responsible for oxygen transport?
Which type of blood cell is responsible for oxygen transport?
What percentage of blood volume is made up of corpuscles?
What percentage of blood volume is made up of corpuscles?
What is the role of Heparin in the bloodstream?
What is the role of Heparin in the bloodstream?
Which of the following is NOT a type of blood corpuscle?
Which of the following is NOT a type of blood corpuscle?
Which of the following substances is NOT typically found in plasma?
Which of the following substances is NOT typically found in plasma?
What type of connective tissue is blood classified as?
What type of connective tissue is blood classified as?
What is the primary role of dendrites in neurons?
What is the primary role of dendrites in neurons?
Which part of the neuron is responsible for transmitting impulses to other cells?
Which part of the neuron is responsible for transmitting impulses to other cells?
What type of cells form the myelin sheath in the peripheral nervous system?
What type of cells form the myelin sheath in the peripheral nervous system?
What is a key characteristic of neurons compared to other cell types in the body?
What is a key characteristic of neurons compared to other cell types in the body?
How does the presence of the myelin sheath affect the conduction of nerve impulses?
How does the presence of the myelin sheath affect the conduction of nerve impulses?
What component of a neuron is involved in the regeneration process?
What component of a neuron is involved in the regeneration process?
Which feature distinguishes the nodes of Ranvier in a neuron?
Which feature distinguishes the nodes of Ranvier in a neuron?
What is the main reason neurons have limited power of regeneration?
What is the main reason neurons have limited power of regeneration?
Study Notes
Plant Meristems
- Apical Meristem: Located at the tips of shoots and roots, responsible for lengthening growth.
- Root Cap: Protects the apical meristem from soil damage during growth.
- Intercalary Meristem: Found at the base of leaves or internodes; aids in lengthening growth of specific plant organs like grasses and mints.
- Lateral Meristem: Types include vascular cambium and cork cambium.
- Vascular Cambium: Produces secondary xylem and phloem for plant growth.
Plant Tissue Types
- Collenchyma:
- Provides mechanical support and elasticity.
- Allows bending without breaking, ideal for tendrils and climbers.
- Sclerenchyma:
- Composed of dead, lignified cells; offers rigidity and support.
- Cells are long, narrow, and lack protoplasm.
Phloem Structure and Function
- Sieve Tubes: Transport food materials; mature cells lack nuclei but retain cytoplasm.
- Companion Cells: Assist sieve tubes in food conduction; possess dense cytoplasm and prominent nuclei.
- Phloem Parenchyma: Living cells aiding sideways food transport; stores materials like resin and latex.
- Phloem Fibres: Dead cells, commercial sources of fibers like jute and hemp.
- Phloem Function: Transports photosynthetically prepared food from leaves to storage organs and growing regions.
Blood Composition
- Blood is a connective tissue made of cells in a liquid matrix called plasma.
- Plasma constitutes about 55% of blood and includes water, salts, sugars, and lipids.
- Blood Corpuscles: Three main types
- Red Blood Cells (Erythrocytes): Transport oxygen.
- White Blood Cells (Leucocytes): Part of the immune response.
- Platelets (Thrombocytes): Involved in clotting.
Neurons
- Neurons are the longest cells in the body, with lengths up to 1 meter.
- They have minimal regenerative capacity.
- Structure includes dendrites, cell body, axon covered by a myelin sheath, axon terminals, and synaptic knobs.
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Description
Test your knowledge on the various types of plant meristems and tissue structures. This quiz covers topics such as apical meristem, intercalary meristem, collenchyma, and sclerenchyma, among others. Understand how these tissues contribute to plant growth and function.
