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Which one of the following processes dur...

Which one of the following processes during decomposition is correctly described?

A

Fragmentation - Carried out by organisms such as earthworm.

B

Humification - Leads to accumulation of a dark coloured substance called humus, which undergoes microbial action at a very fast rate .

C

Catabolism - Last step in the decomposition under fully anaerobic condition

D

Leaching - Water soluble inorganic nutrients rise to top layers of soil.

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The correct Answer is:
A
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MODERN PUBLICATION-ECOSYSTEM -COMPETITION FILE (OBJECTIVE TYPE QUESTIONS)(A. MULTIPLE CHOICE QUESTIONS)
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  2. Secondary productivity is rate of formation of new organic matter by:

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

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  4. The first stable product of fixation of atmospheric nitrogen in legumi...

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  5. Detritivores break down detritus into smaller particles. This process ...

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  6. The correct sequence of seral stages in hydrosere is:

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  7. Pyramid of energy is :

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

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  9. Macth the following and select the correct option. (a) Earthworm (...

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

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  11. In a food chain, herbivores are:

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  12. Ecotone is

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

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  14. Secondary succession takes place on/in

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

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

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  17. During biological nitrogen fixation, inactivation of nitrogenase by ox...

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

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