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valerieb1254 | 16:05 Sat 16th Jul 2005 | Quizzes & Puzzles
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which plants exchange carbon dioxide for oxygen at night?....thanks
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submerged plants ??
16:30 Sat 16th Jul 2005
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Trees
16:34 Sat 16th Jul 2005
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All living cells (except those living in volcanic vents utilising sulphur in energy cycles)  respire.  Respiration uses up the gas oxygen and releases the gas carbon dioxide.  Plant cells are no exception to this and do it all the time - day and night.

In the presence of light, green plants can photosynthesise which uses up CO2 and produces oxygen.

21:34 Sat 16th Jul 2005

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