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Ecosystem

Energy Flow and Food Chains Practice Questions

20 free Energy Flow and Food Chains 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 Energy Flow and Food Chains questions

20 questions
  1. Q1. What percentage of the incident solar radiation is generally captured by plants to sustain the entire ecosystem?
  2. Q2. In a Grazing Food Chain (GFC), which of the following represents the correct sequence of energy flow?
  3. Q3. The Detritus Food Chain (DFC) begins with:
  4. Q4. In terrestrial ecosystems, a much larger fraction of energy flows through which of the following?
  5. Q5. Which of the following organisms can occupy more than one trophic level in the same ecosystem at the same time?
  6. Q6. Energy flow in an ecosystem is always:
  7. Q7. According to the 10 percent law, if 10,000 J of energy is available at the producer level, how much energy will be available at the tertiary consumer level?
  8. Q8. What is a 'standing crop' in the context of trophic levels?
  9. Q9. The interconnected matrix of various food chains in an ecosystem is known as a:
  10. Q10. Which organisms are referred to as 'saprotrophs' in the energy flow model?
  11. Q11. In an aquatic ecosystem, the major conduit for energy flow is the:
  12. Q12. Why is the number of trophic levels in a food chain generally limited to 4 or 5?
  13. Q13. Which of the following is a primary consumer in a pond ecosystem?
  14. Q14. If we consider a simple food chain: Grass -> Goat -> Man, the 'Man' occupies which trophic level?
  15. Q15. Based on the source of their nutrition or food, organisms occupy a specific place in the food chain known as their:
  16. Q16. Which of the following is NOT a characteristic of the Detritus Food Chain?
  17. Q17. The measurement of biomass in terms of dry weight is more accurate than fresh weight because:
  18. Q18. In a food chain consisting of Grass -> Grasshopper -> Frog -> Snake -> Eagle, which organism is the 'Tertiary Consumer'?
  19. Q19. The second law of thermodynamics is relevant to ecosystems because:
  20. Q20. Which of the following groups of organisms constitute the second trophic level in a forest ecosystem?