Cells use a variety of mechanisms to move molecules within, into, and out of the cell. How do these mechanisms help the specialized cells in body tissues to function?

How do you date a sample of rock that you suspect as being one of the earliest on earth

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

Diffusion and osmosis are forms of passive transport