In most plants, the stomata on a leaf must be

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

What are charcteristics of lithosphere?

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.