Reduction of central nervous system activity is the defining feature of

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

Nucleic acid certain protein cell membranes certain carbohydrates

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.