Explain two reasons why having an oxygen-rich atmosphere is important for pife on Earth?

Why can't you grow plants with adhesion water?

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.

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above