What is true about photosynthesis and cellular respiration?

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities

The small molecule cyclic amp (camp) takes about 0.2 second to diffuse 10 μm, on average, in a cell. suppose that camp is produced near the plasma membrane on one end of the cell; how long will it take for this camp to diffuse through the cytosol and reach the opposite end of a very large cell, on average? assume that the cell is 200 μm in diameter.

Can yall plz me on this question im having a hard time think about it