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Which of the following is absent in poll...

Which of the following is absent in polluted water ?

A

Hydrilla

B

Water hyacinth

C

Larva of stone fly

D

Blue-green algae

Text Solution

Verified by Experts

The correct Answer is:
C
Stone flies are exopterygote insects with aquatic nymphs, long antennae, biting mouth parts and weak flight. Adults have the tendency of feed on lichens and unicellular algae. These are good pollution indicators.
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