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[A] : There is a grudual increase in the...

[A] : There is a grudual increase in the energy content at successive trophic level from producer to consumers .
[R]:When one organism benefits the other in a chain , it is called commensalism .

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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[A] : There is a gradual increase in the energy content at successive trophic level from producer to consumers . [R] : Pyramid of energy does not show energy accumulation pattern at different trophic levels .

[A] : Each food-level in an ecosystem is called trophic level . [R] : When an organism benefitted with affecting the other is called commensalism .

Energy transfer from one trophic level to other , in a food chain , is

The energy available to the organism at the third trophic level is called

Assertion : Pyramid of energy shows energy accumulation pattern at different trophic level . Reason : There is a graual increase in the energy content at successive trophic level from producer to consumer .

Increase in concentration of toxic substances at successive trophic levels due to their accumulations, it is called -

[A] : When the organisms live together in such a manner that one organism benefitted , while other has no effects , it is called commensalism . [R] : In commensalism one partner derives benefit from the other partner without in any way benefitting or harming it .

The average trophic efficiency of transfer of energy from one trophic level to the higher trophic level is called.

At the trophic level of consumers, the rate at which food energy is assimilarted, is called ?

[A] : In a food chain , membrane of successive higher levels are fewer in number . [R] : Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level .

TRUEMEN BIOLOGY ENGLISH-Ecology -ASSERTION AND REASON
  1. [A] : A food chain is a group of organism in which there is a transfer...

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  2. [A] : Food chains are not paths of energy flow throgh and ecosysterm. ...

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  3. [A] : There is a grudual increase in the energy content at successive ...

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  4. [A] : There is a gradual increase in the energy content at successive ...

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  5. [A] : Carbon monoxide is poisonous . [R] : It destroys RBC .

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  6. [A] : An estimation of B.O.D gives an indication of the amount of poll...

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  7. [A] : PAN is a secondary pollutant . [R] : The secondary pollutants ...

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  8. [A] : Soil particles , particularly clay and organic matter in soil , ...

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  9. [A] : Algal blooms deplete dissolved O(2) levels in polluted water bod...

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  10. [A] : Orchids are most threatened plants in tropics . [R] : Tropical...

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  11. [A] : Vegetation in the catchment areas prevents flash floods in the d...

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  12. [A] : Sedimentation , a process that has been going on since the earth...

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  13. [A] : When the organisms live together in such a manner that one organ...

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  14. [A] : Aerenchyma is a specialized tissue in some water plants characte...

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  15. [A] : The pyramid of biomass indicates the decrease or the gradual red...

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  16. [A] : Climate is affected by vegetation . [R] : The indirect factors...

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  17. [A] : Man is the consumer of the ecosystem . [R] : An antiforest con...

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  18. [A] : The importance of ecosystem lies in flow of energy and cycling o...

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  19. [A] : Biomonitoring is reliable for determining the pollutants in air ...

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  20. [A] : The food webs are very important in maintaining the stability of...

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