What materials do motor neurons need to survive and how do they get those materials?

What do animals wth echolocation have in common other than echolocation

What statements describe a host organism?

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.