AFCAT II 2014 Solved Paper

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Question : 33 of 100

Marks: +1, -0

Algae often float on surface of water during day but sinkduring night due to :

evolution and trapping of oxygen bubbles during theday in their photosynthesis process
Becoming light as they consume most of their food inthe night
warming action of sun during the day
Release of absorbed air by warming of water

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