Algae often float on the surface of wate...

Algae often float on the surface of water during day but sink down during night due to

A

Evolution and trapping of oxygen bubbles during the day in their photosynthesis

B

Becoming light as they consume most of their food in the night

C

Warming action of sun during the day

D

Release of absorbed air by warming of water.

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The correct Answer is:

A

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