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MCQs for Ecosystem
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MCQs for Ecosystem
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25 Questions

1. The annual net primary productivity of the whole biosphere is approximately
2. The ultimate energy source of all ecosystems is
3. Which one of the following exhibits least productivity ?
4. Successions that occur on soils or areas which have recently lost their community are referred to as
5. Primary productivity depends upon
6. Which of the following is considered as pioneer community in xerarch ?
7. Which of the following pairs is not correct ?
8. The reservoir for the gaseous type of biogeochemical cycle exists in
9. Among the following biogeochemical cycles, which one does not have losses due to respiration ?
10. Mr. X is eating curd/yoghurt. For this food intake in a food chain he should be considered as occupying
11. The biomass available for consumption by the herbivores and the decomposers is called
12. Select the incorrect food chain
13. Which one of the following aspects is not a component of functional unit of ecosystem ?
14. The second stage of hydrosere is occupied by plants like
15. In lithosere, foliose lichens make the conditions favourable for the growth of
16. Vertical distribution of different species occupying different levels in dense vegetation is called
17. During the process of decomposition
18. Which one of the following is the most productive ecosystem ?
19. The process of mineralisation by microorganisms helps in the release of
20. Which of the following ecosystems is most productive in terms of net primary production ?
21. Percentage of photosynthetically active radiation (PAR) that is captured by plants in synthesis of organic matter is
22. During the process of ecological succession, the changes that take place in communities are
23. Which of the following processes does not contribute to the C02 pool in the atmosphere ?
24. If 10 joules of energy is available at the producer level, then amount of energy present at the level of secondary consumers is
25. The ecosystem services include

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