Is the pelvic girdle part of the axial or appendicular skeletal system?

The transport tubes for food coming down the plants are called?

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.

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the