QUESTION

Hard

Environment & Ecology

Prelims 2014

Which one of the following is the correct sequence of a food chain?

Select an option to attempt

Explanation

Diatoms These are microscopic, single-celled algae that are primary producers in aquatic ecosystems. They use photosynthesis to convert sunlight, water, and carbon dioxide into organic matter (food).

Crustaceans These are small aquatic animals like shrimp, crabs, and krill. They are primary consumers in the food chain and feed on diatoms and other phytoplankton (microscopic plants).

Herrings These are small schooling fish that are secondary consumers in the food chain. They feed on crustaceans and other zooplankton (microscopic animals).

So, the energy flow starts with diatoms (producers) being eaten by crustaceans (consumers), which are then eaten by herrings (higher-level consumers).

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