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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-ECOSYSTEM-Assignment (Section C)
  1. The primary producers of the deep-sea hydrothermal vent ecosystem 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 waters are:

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  6. During ecological succession:

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

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

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  9. Secondary succession takes place on/in

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

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  11. Match the following and select the correct option :

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

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  13. If 20 J of energy is trapped at producer level, then how much energy w...

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  14. Natural reservoir of phosphorus is:

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  15. Secondary productivity is rate of formation of new organic matter by:

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

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

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  18. The upright pyramid of number is absent in

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

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  20. Given below is an imaginary pyramid of numbers. What could be one of t...

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