If phytoplanktons are destroyed in the sea, then

It will not affect the food chain.

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Secondary consumers will increase.

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Primary consumers will decrease.

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Algae will get more space to grow.

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Solution

The correct option is C Primary consumers will decrease.
Planktons are small photosynthetic organisms. They are primary producers of aquatic food chains. They provide food, energy and oxygen to aquatic organisms. If they are destroyed then aquatic food chain will get disturbed.
Thus, the correct answer is option (C).

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Question 20
If a grasshopper is eaten by a frog, then the energy transfer will be from

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(b) producer to primary consumer
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(a) producer to decomposer

(b) producer to primary consumer

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