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[A] : Orchids are most threatened plants...

[A] : Orchids are most threatened plants in tropics .
[R] : Tropical deforestation is the single cause for the rapid loss of orchids .

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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TRUEMAN BIOLOGY-Ecology -ASSERTION AND REASON
  1. [A] : Soil particles , particularly clay and organic matter in soil , ...

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

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

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

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  5. [A] : Sedimentation which has been going on since the earth was forme...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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