What was one reason that Wegener's hypothesis of continental drift was rejected? * A) He could not support that the continents were once adjacent.
B) He could not support the idea that climates of certain landmasses had been different
C) He could not explain what was moving the continents.
D) He could not explain where the continents had moved.

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.