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UPSC Civil Services Test Prep: Class 12 Biology
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UPSC Civil Services Test Prep: Class 12 Biology
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24 Questions

1. If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be
2. Which of the following is an ecosystem service provided by a natural ecosystem?
3. During the process of ecological succession the changes that take place in communities are:
4. Which of the following is not a producer?
5. Which one of the following has the largest population in a food chain?
6. Among the following biogeochemical cycles which one does not have losses due to respiration?
7. The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called:
8. The second trophic level in a lake is
9. During the process of ecological succession the changes that take place in communities are:
10. Which of the following is an ecosystem service provided by a natural ecosystem?
11. If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be
12. The process of mineralization by microorganisms helps in the release of:
13. Which of the following ecosystems is most productive in terms of net primary production?
14. An inverted pyramid of biomass can be found in which ecosystem?
15. Edaphic factor refers to:
16. The second trophic level in a lake is
17. Which of the following type of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100mm
18. How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?
19. What is the percentage of photosynthetically active radiation (PAR) in the incident solar radiation?
20. What is the percentage of photosynthetically active radiation (PAR) in the incident solar radiation?
21. Among the following, where do you think the process of decomposition would be the fastest?
22. The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called:
23. The process of mineralization by microorganisms helps in the release of:
24. An inverted pyramid of biomass can be found in which ecosystem?

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