Which of the following scenarios could cause stomata to close?
rain has fallen every day for ten days.
the soil around the plant is very dry.
the soil around the plant is very wet.
the plant lives near a wetland area.

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen