5. How are Stages 1 and 4 of demographic transition model above similar?

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.

Amap's orientation is typically determined by an

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.