Moons are natural satellites. They do not orbit the Sun directly. Instead, they move in an orbit around a celestial body, such as a planet. Which celestial bodies have one or more moons?
meteors
comets
dwarf planets
meteoroids
planets

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.