IB Biology Chapter 4: Ecology

40 Questions | Total Attempts: 2501

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IB Biology Chapter 4: Ecology

4. 1 Species, communities and ecosystems 4. 2 Energy flow 4. 3 Carbon cycling 4. 4 Climate change


Questions and Answers
  • 1. 
    What are species?
    • A. 

      Species are groups of organisms that can potentially interbreed to produce fertile offspring

    • B. 

      Species are a population that can potentially interbreed to produce fertile offspring

    • C. 

      Species are groups of organisms that can potentially interbreed to produce offspring

    • D. 

      Species are a group of the same organism that can produce offspring

  • 2. 
    What is a population?
    • A. 

      A population is a group of species who live in the same area

    • B. 

      A population is a group of organisms of the same species who live in the same area at the same time

    • C. 

      A population is a group of species who live at the same time

    • D. 

      A population is a group of organisms of the same species

  • 3. 
    Organisms that make their own carbon compounds from carbon dioxide and other simple substances are: 
  • 4. 
    Some unicellular organisms use both methods of nutrition.
    • A. 

      True

    • B. 

      False

  • 5. 
    Consumers are heterotrophs that feed on living organisms by: 
  • 6. 
    Unicellular consumers take the food in by ____ and digest it inside vacuoles.Multicellular consumers take food into their ____ by swallowing it.
    • A. 

      Exocytosis, digestive system

    • B. 

      Digestive system; endocytosis

    • C. 

      Endocytosis; digestive system

    • D. 

      Endocytosis; stomach

  • 7. 
    Detrivores digest dead organic matter and then ingest it internally and absorb the products of ingestion.
    • A. 

      True

    • B. 

      False

  • 8. 
    Saprotrophs are ____ that obtain organic nutrients from ____ by ____ digestion (check multiple boxes)
    • A. 

      Heterotrophs

    • B. 

      Autotrophs

    • C. 

      Dead organic matter

    • D. 

      Internal

    • E. 

      External

    • F. 

      Living organisms

  • 9. 
    What is a community?
    • A. 

      A community is formed by populations of different species living together and interacting with each other

    • B. 

      A community is formed by populations of the same species living together and interacting with each other

    • C. 

      A community is formed by populations of different species living in different areas

    • D. 

      A community is formed by populations of different biotic and abiotic factors

  • 10. 
    When the null hypothesis is rejected, it automatically means the alternative hypothesis is true
    • A. 

      True

    • B. 

      False

  • 11. 
    What is an ecosystem?
    • A. 

      All the living organisms and abiotic factors that do not interact with each other

    • B. 

      The abiotic environment in an area

    • C. 

      The community of organisms in an area

    • D. 

      The community of organisms in an area and their non-living environment

  • 12. 
    Living organisms need a supply of chemical elements
    • A. 

      True

    • B. 

      False

  • 13. 
    What are the three requirements for sustainability in ecosystems?
    • A. 

      Nutrient availability

    • B. 

      Chemicals

    • C. 

      Living organisms

    • D. 

      Detoxification of waste products

    • E. 

      Energy availability

    • F. 

      Water supply

  • 14. 
    Light energy is converted to chemical energy in carbon compounds by:
    • A. 

      Photosynthesis

    • B. 

      Heterotrophs

    • C. 

      Consumers

    • D. 

      Sunlight

  • 15. 
    Producers can release energy by:
    • A. 

      Photosynthetic pigments

    • B. 

      Cell respiration

    • C. 

      Sunlight

    • D. 

      Chemical compounds

  • 16. 
    What is a food chain?
    • A. 

      A diagram that shows energy produced

    • B. 

      A diagram that shows producers and consumers

    • C. 

      A sequence of organisms, each of which feeds on the previous one.

    • D. 

      A sequence of organisms, each of which feeds on the following one.

  • 17. 
    Oxidation reactions are ____ and the energy released is used in ____ reactions to make ATP
    • A. 

      Exothermic; endothermic

    • B. 

      Endothermic; exothermic

    • C. 

      Endothermic; endothermic

    • D. 

      Exothermic; chemical

  • 18. 
    Living organisms cannot convert heat to other forms of energy
    • A. 

      True

    • B. 

      False

  • 19. 
    Autotrophs absorb carbon dioxide from the atmosphere. This ____ the carbon dioxide concentration of the atmosphere.
  • 20. 
    Carbon dioxide is soluble in water. It can form:
    • A. 

      Hydrogen H+

    • B. 

      Carbonic acid H2CO3

    • C. 

      Carbon dioxide CO2

    • D. 

      Carbonate CO3 2-

  • 21. 
    What cells carry out aerobic cell respiration? (multiple answers correct)
    • A. 

      Saprotrophs

    • B. 

      Non-photosynthetic cells in producers

    • C. 

      Animal cells

  • 22. 
    Archaeans carry out methanogenesis in ____ environments.
  • 23. 
    Peat forms when organic matter is _____ because of anaerobic conditions in waterlogged soils.
  • 24. 
    The products of complete combustion are:(multiple answers correct)
    • A. 

      Carbon dioxide

    • B. 

      Water

    • C. 

      Methane

    • D. 

      Oxygen

  • 25. 
    Limestone rock is formed of:
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