Heterotrophs use carbohydrates as an energy source for synthesizing what molecule?

Which of the following is not a defining characteristic of plants?

Apart of an ecosystem that can restrict the growth of a population is referred to as

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.