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Which one of the following processes dur...

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

A

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

B

Catabolism -Last step in the decomposition under fully anaerobic condition.

C

Leaching -water soluble inorganic nutrients rise to the top layers of soil

D

Fragmentation -Carried out by organisms such as earthworm

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The correct Answer is:
D
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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. Which one of the following is not a functional unit of an ecosystem

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  5. The upright pyramid of number is absent in

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

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

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  8. Identify the possible link ''A'' in the following food chain : Plant r...

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  9. The rate of formation of new organic matter by rabbit in a grassland, ...

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  10. The second stage of hydrosere is occupied by plants like

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  11. Identify the likely organisms (a), (b), (c) and (d) in the food web sh...

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  12. Mass of living matter at a trophic level in an area at any time is cal...

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  13. Which one of the following statements is correct for secondary success...

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  14. Which one of the following statements for pyramid of energy is incorre...

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  15. Which one of the following animals may occupy more than one trophic le...

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  16. Both, hydrarch and xerarch successions lead to

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  17. Of the total incident solar radiation the proportion of PAR is:

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  18. The breakdown of detritus into smaller particles by earthworm is a pro...

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  19. The biomass available for consumption by the herbivores and the decomp...

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  20. Which of the following representations shows the pyramid of numbers in...

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