A) Hydrilla
B) Water hyacinth
C) Larva of stone fly
D) Blue-green algae
Correct Answer: C
Solution :
Stone flies are exopteiygote insects with aquatic nymphs, long antennae, biting mouth parts and weak flight. Adults have the tendency to feed on lichens and unicellular algae. Hence, these are absent in polluted water.
You need to login to perform this action.
You will be redirected in
3 sec
