Ozone is know to cause respiratory problems in humans and damage plants. however, the ozone layer provides protection for earth. explain where ozone is found, what it does, and what causes its depletion. : )

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.