How does pH affect plant growth?

Aplant may open end close its stomata to prevent excess water loss and maintain

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.

This diagram shows how seed plants are grouped. which is the missing label? bryophytes angiosperms pteridophytes monocots