A food chain in an ecosystem flows from green algae, to freshwater snails, to small fish, and finally to large fish.

Question

Which organism is the primary consumer?

large fish
small fish
green algae
freshwater snails

Answer 1

In the given food chain, the primary consumer is the freshwater snails. Primary consumers are the organisms that eat producers (in this case, green algae), while secondary consumers eat the primary consumers. Therefore, in this chain:

• Green algae (producer) -> Freshwater snails (primary consumer) -> Small fish (secondary consumer) -> Large fish (tertiary consumer).