Photosynthesis in the leaves of plants involves many steps, but it can be divided into two stages: the light-dependent reactions and the Calvin cycle. The light-dependent reactions take place in the thylakoid membrane and require a continuous supply of light energy.
( So basically there are 2 stages )
Answer:
I think the answer is D because mens testosterone levels are high until the age of 40, then the lower.
Explanation:
