Definition of direct cost (enviromental science)

In the water cycle , when does water undergo a chemical change

What molecule contains an organisms genetic material, passed down from parents to their offspring

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.