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Ecosystem

A food chain ...

Question

A food chain occurring in the sea which provides food for many people can be written as:
phytoplankton → zooplankton → X → Y

(e) Which organism in the above food chain is a (i) primary consumer, and (ii) tertiary consumer?

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Solution

In this food chain,
(i) Primary consumer is zooplankton as it eats the producer i.e. phytoplankton.
(ii) Tertiary consumer is Y, which can be either duck, big fishes or humans.

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