In a polluted lake, the index of pollution is [DPMT 1983]
A) Daphnia
B) Artemia
C) Frog
D) None of the above
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I GUESS IT IS DAPHNIA
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Answer:
None of the above organisms are the index of a polluted lake.
Explanation:
The above mentioned organisms live in different aquatic conditions but not specified to be grown in polluted conditions.
Frogs are the organisms that are observed in day to day life and not index of pollution as they grow both in fresh water and muddy ponds.
Artemia is also called brine shrimp which grows in fresh water.
Daphnia are commonly called water fleas and grows in various auatic conditions.
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