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Class 12 Biology Practice Test: Ecosystem - Energy Flow
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Class 12 Biology Practice Test: Ecosystem - Energy Flow
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25 Questions

1. A chicken has just eaten a worm. When a man sees this, he eats that chicken. To which trophic level does the man belong?
2. From which law of energy the ecosystem are not exempted?
3. Which one of the following is the correct sequence of an aquatic food chain?
4. Which is an exception in an ecosystem where the sun is not the source of energy?
5. During the flow of energy in an ecosystem, in which form is the energy dissipated during various metabolic activities?
6. What happens when the food energy passes from herbivores to carnivores and to the next organism?
7. What do we study in ecological energetics?
8. What the only source of energy for all ecosystems on Earth?
9. Which organisms do not have any fixed trophic levels?
10. What amount of sunlight is used for photosynthesis?
11. Which organisms form trophic levels in an ecosystem?
12. Which of the following organisms belong to the category of primary consumers?
13. What is the missing level?
Autotrophs → ? → Decomposer
14. Which one of the following is the correct sequence of a grassland food chain?
15. What percent of the incident solar radiation is photosynthetically active radiation (PAR)?
16. What will happen if we remove the decomposers from an ecosystem?
17. What is the missing level?
? → Heterotrophs → Decomposer?
18. What percent of PAR is captured by plants?
19. What is the food chain beginning with host and ending with a parasite (ecto as well as endoparasite) called?
20. What is the missing level of the organization?
Grass → Cow → Wolf → ?
21. What is the spectral range of solar radiation in that photosynthetic organisms are able to use in the process of photosynthesis called?
22. Which of the following event occurs in an ecosystem?
23. Which of the following consumers belong to the third level of energy flow?
24. Whose population is highest in an ecosystem?
25. Who are the major producers in a terrestrial ecosystem?

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