I can’t think of an animal that doesn’t have some kind of day/night cycle. I’d be surprised if it didn’t impact almost every living thing in some way. Plants generally photosynthesize, which means they are probably also highly in sync with cycles of the sun, but what do they do at night? Is that when they move nutrients around? Make complex starches? Do other cool stuff? Do they sleep?
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Sort of. Plants use the dark times to metabolize the sugars they produce during the day and exhale oxidized carbon. It’s when they get most of their growth done.
There are some plants that use crassulacean acid metabolism to recycle the carbon dioxide they produce and re-use it during the day; this lets them keep their pores closed during the day and conserve water.
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