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Environment and Ecology


19. 

Which of the following is used as "Biofertilizer"?

Answer : A. Rhizobium

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20. 

Consider the following statements:
I.Acid rain is natural and also due to man made causes
II. Acid rain has global ecological problem
III. Acid rain increase the acidity of soil
IV. Acid Rain affect plants and animals
of these statements

Answer : D. All are correct

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21. 

Identify the sequence of energy flow in a terrestrial eco system?

Answer : B. Grass-> Grasshoper->frog->Snake->Owl

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22. 

Acid rain results from

Answer : C. Air pollution

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23. 

An ecosystem consists of

Answer : A. A living community and its environment

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