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4 answers

Some do. Others only use oxygen at night. If the skies darkened from meteor impact, would we compete with plants for the oxygen? But this was your question. Sorry.

2007-03-15 00:29:56 · answer #1 · answered by Kes 7 · 1 0

CAM plants which photosynthesize at nights produce oxygen then.

2007-03-15 10:10:02 · answer #2 · answered by Anonymous · 0 0

All chlorophyll Bering plants[trees etc] produce oxygen at night

2007-03-15 07:17:23 · answer #3 · answered by Billy Butthead 7 · 0 1

How is it possible. Oxygen is generated by photosystem and photosystem needs chlorophyll.
There should be none.

2007-03-15 06:55:43 · answer #4 · answered by anurag 2 · 0 0

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