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Which one of the following is a characte...

Which one of the following is a characteristic feature of cropland ecosystem?

A

Ecological succession

B

Absence of soil organisms

C

Least genetic diversity

D

Absence of weeds

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-ECOSYSTEM-Assignment (Section C)
  1. The primary producers of the deep-sea hydrothermal vent ecosytem are

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  2. Which of the following would appear as the pioneer organisms on bare r...

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  3. Which one of the following is a characteristic feature of cropland eco...

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  4. The term ecosystem was coined by

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  5. Most animals that live in deep oceanic wa- ters are

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  6. In which of the following both pairs have correct combination?

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  7. During ecological succession

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  8. Vertical distribution of different species occupying different levels ...

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  9. In an ecosystem the rate of production of organic matter during photos...

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  10. Secondary succession takes place on/in

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  11. The mass of living material at a trophic level at a particular time is...

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  12. Match the following and select the correct option :

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  13. Given below is a simplified model of phosphorus cycling in a terrestri...

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  14. If 20J of energy is trapped at producer level, then how much energy wi...

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  15. Natural reservoir of phosphorus is

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  16. Secondary productivity is rate of formation of new organic matter by

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  17. Which one of the following processes during decomposition is correctly...

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  18. Which one of the following is not a functional unit of an ecosystem

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  19. The upright pyramid of number is absent in

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  20. Which one of the following is not a gaseous biogeochemical cycle in ec...

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