The diagram below represents the time a cell spends in the two main phases of the cell cycle. Which section of the diagram represents the phase during which the cell divides, and what is this phase called?

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.