With higher amounts of CO2 in the atmosphere is photosynthesis or cellular respiration going to be most affected and how? 20 points help!!

Explanation:

Processes or regions that predominately produce atmospheric carbon dioxide are called sources. Carbon dioxide is added to the atmosphere naturally when organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossil fuels and forests and the production of cement.

Photosynthesis

Explanation:

Because photosynthesis need CO2 to work, but for cellular respiration CO2 is a waste, so it is  contributing to the higher amounts of CO2 but it does not affect it

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.