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Question

Observe the following food chain.

Ice algae Zooplankton Arctic cod fish Seals Polar bear

What will happen if ice melts and the ice algae population drops down?

A
Seal population will increase
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B
Polar bear population will decrease
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C
Arctic cod fish population will decrease
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D
Polar bear population will increase
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Solution

The correct option is C Arctic cod fish population will decrease
Food chain is a series of organisms with a relationship of who eats what.
Therefore, when the population of sea algae drops down, every organism in the chain that depends on it for food will eventually face the scarcity of food.
Thus, the population of the consumers i.e. zooplankton, arctic cod fish, seal and polar bear will decrease.

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