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Ecosystem

Ecosystem Structure and Function Practice Questions

20 free Ecosystem Structure and Function practice questions for the NCERT Biology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.

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All Ecosystem Structure and Function questions

20 questions
  1. Q1. Which of the following are the four basic components that function as a unit in an ecosystem?
  2. Q2. Vertical distribution of different species occupying different levels in a biotic community is known as:
  3. Q3. The rate of biomass production per unit area over a time period by plants during photosynthesis is called:
  4. Q4. What is the relationship between Net Primary Productivity (NPP) and Gross Primary Productivity (GPP)?
  5. Q5. The rate of formation of new organic matter by consumers is defined as:
  6. Q6. Which of the following ecosystems generally has the lowest net primary productivity?
  7. Q7. The process of breaking down complex organic matter into inorganic substances like carbon dioxide, water, and nutrients is called:
  8. Q8. During decomposition, the process by which water-soluble inorganic nutrients go down into the soil horizon and get precipitated as unavailable salts is called:
  9. Q9. Which of the following factors favors a faster rate of decomposition?
  10. Q10. In a terrestrial ecosystem, what percentage of the energy in the sunlight is typically captured by green plants (PAR)?
  11. Q11. In an aquatic ecosystem, which food chain is the major conduit for energy flow?
  12. Q12. According to Lindeman’s 10 percent law, if 1000 J of energy is available at the producer level, how much energy will be available at the secondary consumer lev…
  13. Q13. Each trophic level has a certain mass of living material at a particular time called the:
  14. Q14. The pyramid of biomass in a sea/ocean ecosystem is generally:
  15. Q15. Which pyramid can NEVER be inverted in a functional ecosystem?
  16. Q16. The amount of nutrients, such as carbon, nitrogen, phosphorus, and calcium, present in the soil at any given time is referred to as:
  17. Q17. What is the primary reservoir for the gaseous type of nutrient cycle (e.g., Nitrogen, Carbon)?
  18. Q18. In the phosphorus cycle, what serves as the natural reservoir of phosphorus?
  19. Q19. Which of the following is NOT a limitation of ecological pyramids?
  20. Q20. Robert Costanza and his colleagues tried to put price tags on nature’s life-support services. Which service was assigned the highest share of the total cost?