Base your answers to question 14 on the diagram below. which illustrates a transport pathway of CO2 in the
human body, and on your knowledge of biology.

14. State what would happen to the production of
bicarbonate ions (HCO 3 - ) if the carbonic anhydrase
were not present in red blood cells. [1]

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

Identify the terms using the following picture. principle of dominance item 1 can be described as the . item 2 can be described as the . the "p" represents from one parent.

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.