Question

Pick up the correct food chain

(a) grass —> chamelion —> insect —> bird

(b) grass —> fox —> rabbit —» bird

(c) phytoplankton —> zooplankton —> fish

(d) fallen leaves —> bacteria —> insect larvae.

Answer 1

(C) phytoplankton - > zooplankton - > fish

Option C is correct as Phytoplanktons (spirulina, chlorella etc) are the primary producers which can carryout photosynthesis to produce their own food while primary consumers like zooplanktons (ctnephore, ciguatera, chaetognatha etc. ) depend on primary producers for their nutritional requirement. hence, they feed on phytoplankton while secondary consumers (fishes) feed upon small plant eating animals to survive.

A) option is incorrect because insect should be primary consumer not chamelion which feed upon grass.

B) option is incorrect as rabbit should be primary consumer to feed upon grass.

D) option is incorrect as insect larvae never feed on bacteria.