Cellular respiration is important
a. convert chemical energy into heat energy.
b. convert chemical energy into usable energy.
c. create internal heat energy necessary for cell division.

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures