In an aquatic ecosystem, the organism present at the trophic level equivalent to cows in grasslands is

Options

A. phytoplanktons
B. large fishes
C. sea gulls
D. zooplanktons.

Answer

D

Explanation

In and aquatic ecosystem, the important herbivores are zooplankton, larve, tadpoles, etc. Cows in grasslands also act as herbivores as they feed on producers. Thus, both cows and zooplankton occupy second trophic level in terrestrial and aquatic ecosytem respectively.