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[A] : Biomonitoring is reliable for dete...

[A] : Biomonitoring is reliable for determining the pollutants in air , water and soil .
[R] : The living organism reacts to minute changes in the environment .

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] : Biomonitoring is reliable for determing the pollutants in air , water and soil . [R] : The living organism reacts to minute changes in the environment .

List any three important pollutants of air, water and soil pollution.

Living organisms and water, air and earth collectively form

[A] : Living organisms are like a close system . [R] : Energy in the organisms neither can be lost nor gained from the another environment .

[A] : The importance of ecosystem lies in flow of energy and cycling of materials . [R] : Pollutants do not change the equilibrium of environment .

[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 .

We know that many human activities lead to increasing levels of pollution of the air, water-bodies and soil. Do you think that isolating these activities to specific and limited areas would help in reducing pollution?

[A] : Population density of indicator organisms show degree of water pollution . [R] : BOD is an index of organic waste in water .

Pollutants are the substances which present in the environment in greater proportion than its natural abundance and resulting in harmful or deterimental effect on the quality of environment. Generally highly toxic substances are considered . Generally highly toxic even substances that are normally considered harmless can cause pollution if they are present in underirable concentration. Over exploitation of natural resourses uncontrolled mechanisation deforestation and extensive use of chemical fertilizers and pesticides have brought about many changes in different component of the environment . Which one of the air pollutant is most toxic?

[A] : An estimation of B.O.D gives an indication of the amount of pollution in a body of water . [R] : B.O.D is measure of the oxygen requirements of the bacteria , which are living in the water .

TRUEMEN BIOLOGY ENGLISH-Ecology -ASSERTION AND REASON
  1. [A] : Man is the consumer of the ecosystem . [R] : An antiforest con...

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

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

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

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  5. [A] : If phytoplanktons are destroyed in the sea then it will effect t...

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  6. [A] : Epiphytes are not found in Delhi . [R] : Delhi has semi-arid c...

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  7. [A] : Water logged soils are physiologically dry . [R] : When the s...

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  8. [A] : There is a chemical warfare amongst some plants . [R] : The ro...

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  9. [A] : Total biomass on land is much more than that in water . [R] :...

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  10. [A] : Epiphytes differs from Lianas in that they are not rooted in th...

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  11. [A] : Biological indicators enhance usefulness of ecology to mankind ...

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  12. [A] : Depletion of ozone layer results in human disease like cancer ....

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  13. [A] : UV irradiation to disinfect polluted waters is not generally re...

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  14. [A] : A species is an interbreeding population which is reproductively...

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  15. [A] : Plants having capacity to withstand wide range of temperature t...

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  16. [A] : Each food-level in an ecosystem is called trophic level . [R]...

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  17. [A] : Biomonitoring is reliable for determing the pollutants in air ,...

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  18. Assertion (A) : Tropical rain forests are disappearing fast from devel...

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  19. [A] : Leaf butterfly & stick insect show mimicry to dodge their enemi...

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  20. [A] : In a food chain , membrane of successive higher levels are fewer...

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