Ncert Exercises & Solutions

The second trophic level in a lake is

(1) Phytoplankton

(2) Zooplankton

(3) Benthos

(4) Fishes

(b) Zooplankton

Zooplankton are primary consumers in aquatic food chains that feed upon

phytoplankton. Therefore, they are present at the second trophic level in a lake.