The diagram below shows several organisms in a fish tank. Which item in the tank produces oxygen? * 1 point

A) plant
B) water
C) snail
D) rock

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.