A cell with 25% particles is placed in a solution with 55% particles. The solution has what type of tonicity? a. hypertonic
b. hypotonic
c. isotonic
d. active

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.

Which type of pollution occurs when small particles of soil are suspended in water? a. radiological pollution b. chemical pollution c. physical pollution d. thermal pollution apex

How is self-pollination similar to cross-pollination?