the process if respiraton is essential in the oxygen/carbon dioxide cycle . respiration removes from the atmosphere and produces and releases to the atmosphere

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

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

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.