Why does CO2 fluctuate over the course of a year? Explain.

answer:

The amount of CO2 found in the atmosphere varies over the course of a year. Much of this variation happens because of the role of plants in the carbon cycle. ... They release oxygen into the air as a byproduct. This process is called photosynthesis

i believe it is c: genes for body color and wing size are inherited separately from each parent.

i think its white blood cells

i hope this