2nd Quarter: Life Science Overview
50 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is viviparity?

  • When eggs develop internally and receive nourishment from the yolk.
  • When eggs are laid outside the mother.
  • When offspring are born at an early developmental stage.
  • When embryos develop internally and receive nourishment directly from the mother's blood. (correct)

    • Which organisms commonly exhibit viviparity?

  • Most cartilaginous fish and many mammals. (correct)
  • Only bony fish.
  • Only mammals and reptiles.
  • All reptiles and amphibians.

    • What is the main purpose of genetic engineering?

  • To create organisms that reproduce without sexual reproduction.
  • To modify genes in living organisms for specific traits. (correct)
  • To eliminate all genetic diseases in humans.
  • To engineer organisms that can survive in extreme environments.

    • What role do plasmids play in genetic engineering?

    <p>They act as a vector transferring genes into other cells.</p> Signup and view all the answers

    Which step occurs first in the genetic engineering process?

    <p>DNA isolation.</p> Signup and view all the answers

    What is a transgene?

    <p>A gene artificially introduced into a new organism's genome.</p> Signup and view all the answers

    What is the definition of a transgenic organism?

    <p>An organism that has had DNA from another organism artificially introduced.</p> Signup and view all the answers

    Which of the following is NOT a characteristic of genetic engineering?

    <p>It takes longer than traditional plant breeding.</p> Signup and view all the answers

    What is the primary function of the nervous system?

    <p>Processes information and directs short-term changes</p> Signup and view all the answers

    Which gland is NOT part of the endocrine system?

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

    Which body system is primarily responsible for the removal of excess water and salts?

    <p>Excretory system</p> Signup and view all the answers

    What is the main purpose of the immune system?

    <p>Defends against microbial pathogens and diseases</p> Signup and view all the answers

    Which of the following regulates long-term changes in the body through hormones?

    <p>Endocrine system</p> Signup and view all the answers

    What organs are primarily involved in the excretory system?

    <p>Kidneys and urinary bladder</p> Signup and view all the answers

    Which system helps maintain homeostasis by regulating water and mineral balance?

    <p>Urinary system</p> Signup and view all the answers

    Which of the following describes a function of the nervous system?

    <p>Processes information and directs short-term responses</p> Signup and view all the answers

    What is the primary function of the respiratory system?

    <p>To deliver air to sites for gas exchange</p> Signup and view all the answers

    Which of the following organs is NOT part of the digestive system?

    <p>Trachea</p> Signup and view all the answers

    How does the integumentary system help in temperature regulation?

    <p>By getting rid of wastes through perspiration</p> Signup and view all the answers

    What is one of the main roles of the diaphragm?

    <p>To assist in the movement of air into the lungs</p> Signup and view all the answers

    What does the integumentary system primarily protect against?

    <p>Water loss and foreign particles</p> Signup and view all the answers

    Which system is responsible for removing carbon dioxide from the body?

    <p>Respiratory system</p> Signup and view all the answers

    What is one function of the large intestine?

    <p>To process and absorb water</p> Signup and view all the answers

    What is the role of nerve endings in the integumentary system?

    <p>To provide a sense of touch and environmental awareness</p> Signup and view all the answers

    What is the primary function of the muscular system?

    <p>Produces movement and generates heat</p> Signup and view all the answers

    Which organ is not part of the skeletal system?

    <p>Blood vessels</p> Signup and view all the answers

    How do organ systems in the body interact?

    <p>They collaborate by exchanging information</p> Signup and view all the answers

    What is one of the functions of the circulatory system?

    <p>Transports waste away from the cells</p> Signup and view all the answers

    Which of the following statements about the body is true?

    <p>The body functions as a complex machine governed by natural laws</p> Signup and view all the answers

    What role does the skeletal system play concerning blood cell production?

    <p>It produces blood cells in the bone marrow</p> Signup and view all the answers

    What is the correct pairing for the function of the skeletal system?

    <p>Provides shape; produces blood cells</p> Signup and view all the answers

    Which of these is NOT a role of the muscular system?

    <p>Stabilizes body temperature and pH</p> Signup and view all the answers

    Which organ system is responsible for protecting soft tissues of the body?

    <p>Skeletal System</p> Signup and view all the answers

    What is a major function of the circulatory system in relation to body temperature?

    <p>It helps to stabilize body temperature</p> Signup and view all the answers

    Which type of reproduction involves the development of an outgrowth or bud from the parent that eventually separates to become a new individual?

    <p>Budding</p> Signup and view all the answers

    What is a characteristic of external fertilization?

    <p>The eggs and sperm unite outside the female's body</p> Signup and view all the answers

    Which of the following statements about sexual reproduction is true?

    <p>It increases the chances of species variation</p> Signup and view all the answers

    What distinguishes ovoviviparity from oviparity?

    <p>In ovoviviparity, eggs are fertilized and develop within the female</p> Signup and view all the answers

    Which reproductive strategy includes fertilization occurring inside the female reproductive tract?

    <p>Internal fertilization</p> Signup and view all the answers

    An organism that develops from a fertilized egg and receives nourishment from its yolk is exhibiting which reproductive method?

    <p>Oviparity</p> Signup and view all the answers

    Which of the following methods of fertilization is most common among amphibians?

    <p>External fertilization</p> Signup and view all the answers

    Which type of reproduction is characterized by fragmentation?

    <p>Fission</p> Signup and view all the answers

    What is a primary benefit of using genetically modified organisms (GMOs) in agriculture?

    <p>Increased productivity and reduced pesticide use</p> Signup and view all the answers

    What is one example of a genetically modified organism that improves nutrition?

    <p>Golden rice</p> Signup and view all the answers

    Which of the following concerns is associated with genetically modified organisms?

    <p>Potential harm to non-damaging insects</p> Signup and view all the answers

    What role do bioluminescent animals play in scientific research?

    <p>They are used for cell identification to detect diseases</p> Signup and view all the answers

    What is the relationship between body systems and homeostasis?

    <p>Body systems work together to maintain internal stability or homeostasis</p> Signup and view all the answers

    What is a disadvantage of genetically modified seeds for farmers?

    <p>They require annual purchases leading to higher costs</p> Signup and view all the answers

    Which genetically modified organism was mentioned as a novelty pet for humans?

    <p>Glofish</p> Signup and view all the answers

    What impact does pest-resistant genetically modified corn ( Bt corn) have on pesticide use?

    <p>It initially reduces but can increase pesticide use later</p> Signup and view all the answers

    Study Notes

    2nd Quarter: Life Science

    • Biology is the scientific study of life, encompassing disciplines like biochemistry and ecology.
    • Biologists use "unifying themes" to study life.
    • Fossil records show the evolution of life forms.
    • Early life forms were prokaryotic and anaerobic.
    • Earliest microfossils (filaments) are 3.5 billion years old, found in Western Australia.
    • These filaments resemble modern photosynthetic bacteria.
    • Evolution is linked to changes in climate and environmental conditions.
    • Evidence for evolution is found in fossil records and molecular biology.

    Timeline of Life Appearance

    • 4.6-3.8 BYA: Early Earth was violent; zircon crystals formed.
    • 3.5 BYA: Prokaryotes appear, in stromatolites.
    • 3.0 BYA: First photosynthetic organisms (cyanobacteria) thrive.
    • 2.0 BYA: First eukaryotes emerge.
    • 500 MYA: Multi-cellular life forms appear.
    • 250 MYA: Paleozoic era, trilobites and cephalopods dominate oceans.
    • 251-65.5 MYA: Mesozoic era (age of reptiles) – Triassic, Jurassic, Cretaceous periods.
    • Recent life and Homo erectus evolution according to fossil evidence during Cenozoic era.

    Lesson 2: Properties of Life

    • Order/High Degree of Organization: Life has highly ordered structures

    • Reproduction: Organisms reproduce their kind.

    • Growth and Development: Consistent growth regulated by DNA.

    • Energy Processing: Organisms use energy for activities; chemical reactions.

    • Response to the Environment: Organisms respond to stimuli.

    • Regulation and Homeostasis: Control of internal environment to maintain life.

    • Evolutionary Adaptation: Traits best suited for environments are passed to offspring.

    • Diversity and Unity: Evolution explains life’s diversity and unity.

    • Successive Levels of Biological Organization: Biosphere, Ecosystem, Community, Population, Organism, Organ system, Organ, Tissue, Cell, Organelle, Molecule, Atom. This shows how life is studied at different levels.

    Lesson 3: The Reproduction of Animals

    • Reproduction is a vital characteristic of life, ensuring the continued existence of a species.

    • Reproduction is either sexual or asexual.

    • Asexual Reproduction: One parent produces offspring that are genetically identical (clones). Common forms are fission, fragmentation, and budding.

    • Sexual Reproduction: Two parents produce offspring with unique genetic combinations through the union of egg and sperm. Fertilization can be internal or external. Internal fertilization involves the union of egg and sperm within the female reproductive tract. External fertilization takes place outside the female reproductive tract.

    Week 4: Genetic Engineering

    • Genetic engineering modifies genes in living organisms.
    • This leads to genetically modified organisms (GMOs), also called transgenic organisms.
    • GMO modifications improve organism quality and are used in medicine, the environment and agriculture.
    • Genetic engineering is used in multiple scenarios, such as to create insulin, bioplastics, pest-resistant crops, etc.

    Week 5: Body Systems

    • The body is made up of systems functioning in coordinated manner.
    • Organ systems include Muscular, Skeletal, Circulatory/Cardiovascular, Nervous, Immune, Endocrine, Urinary, Excretory, Respiratory, Digestive, and Integumentary.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    2nd Quarter Life Science (Week 1-2) PDF

    Description

    This quiz covers essential topics in Life Science, including the study of biology, unifying themes in the understanding of life, and the timeline of life's appearance on Earth. Explore the evolution of prokaryotic and eukaryotic life forms, alongside their environmental interactions over billions of years.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser