The exchange of gasses between blood in systemic capillaries and tissue cells is termed:

What is called the "building block" of life?

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.

Climate warming trends allow plant and insect species to inhabit larger ranges. select the best answer from the choices provided