What is the function of the companion cell

Which would prevent a plant from growing

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.