Question #05c36

1 Answer
hsk
May 5, 2017

Plants use #CO_2# in night in light independent cycle, thus plants do not exhale #CO_2#.

Explanation:

Plants have two step mechanism to use atmospheric #CO_2# as a source of nutrition.
1. Light dependent mechanism or hill's reaction or light reaction
2. Light-independent mechanism or dark reaction or Calvin cycle

Stomata is required by plants to Exchange gases and water vapors during day time. In Night time gaseous and water vapors exchanges are not required and have to be limited. Due to these factors Stomatas close and inhibits any such exchanges.

Point to note: Not all Stomata close at night few numbers, which is negligible compared to whole number on a plants leaf, remains open at night too.

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