Scientists are monitoring the pH of oceans. Which of these are they most likely studying? A. the population of polar bears
B. the health of coral colonies
C. the level of carbon dioxide in the air
D. the rise of sea level

How do chloroplasts set plants apart from other living things

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

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.