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[A] : The biotic community and the non l...

[A] : The biotic community and the non living enviroment of an ara function together to form a ecosystem .
[R]: The change in biotic components causes a change in abiotic components also.

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] : Ecology is the study of interrelationship between living organisms and their non-living environment . [R] : The biotic community and non-living environment of an area function together to form an ecosystem .

Interaction between biotic and abiotic components leads to formation of a:

[A] : A biotic community exhibits adaptive radiation . [R] : The organisms of different populations have some features in common due to the effect of the same abiotic factors of the environment .

[A] : Every biological system resists a change and wants to remain in a state of equilibrium . [R] : Climax communities of an ecosystem are produced after several changes it has gone through succession .

Assertion (A): Non-ideal solutions form azeotropic mixture. Reason (R ): The boiling point of an azeotropic mixture is only higher than boiling points of both components.

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The solution which boil at constant temperature like a pure liquid and possess same composition in liquid as well as vapour state are called azeotropes. The components of azetropes cannot be separated by fractional distillation. Only non-ideal solutions form azeotropes. Solutions with negative deviation form maximum boiling azeotrope and the solutions with positive deviation form minimum boiling azeotrope. The boiling point of an azeotrope is never equal to the boiling points of any of the components of the azeotrope. Answer the following question: The azeotropic solutions of two miscible liquids Solutions which distill without any change in composition or temperature are called

A cheetah, on seeing a prey, moves towards him at a very high speed. What causes the movement of his muscles? How does the chemistry of cellular components of muscles change during this event?

TRUEMAN BIOLOGY-Ecology -ASSERTION AND REASON
  1. [A] : Primary productivity is shown by green plants only . [R] : Pri...

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  2. [A] : Energy pyramid is sloping . [R] : The energy of one trophic le...

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  3. [A] : The biotic community and the non living enviroment of an ara fun...

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  4. [A] :Green plants ara secondary consumers [R]: Microconsumers break...

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  5. [A] : A food chain is a group of organism in which there is a transfer...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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