A food chain occurring in the sea which provides food for many people can be written as $p h y t o p l a n k t o n \to z o o p l a n k t o n \to X \to Y$

(a) Name one phytoplankton.

(b) Name two zooplankton.

(c) What could be X?

(d) Name the organism which Y could be.

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

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Solution

(a) Algae are phytoplankton.

(b) Jellyfish and copepods are examples of zooplankton.

(c) X is a small fish.

(d) Y could be a big fish.

(e) (i) Zooplankton is a primary consumer, and (ii) big fish are tertiary consumers.

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(a) Algae are phytoplankton. (b) Jellyfish and copepods are examples of zooplankton. (c) X is a small fish. (d) Y could be a big fish. (e) (i) Zooplankton is a primary consumer, and (ii) big fish are tertiary consumers.

(a) Algae are phytoplankton.

(b) Jellyfish and copepods are examples of zooplankton.

(c) X is a small fish.

(d) Y could be a big fish.

(e) (i) Zooplankton is a primary consumer, and (ii) big fish are tertiary consumers.