Athletes are often concerned with the question of how much protein they need in their diets because of the requirement of growing muscles for protein. Just as
muscles need the basic building block of protein, protein itself has basic building
blocks also. Proteins are large macromolecules composed of ---
a. Sugars
b. Nucleic acids
C. Amino acids
d. Fatty acids

Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. the chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. the chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production c. free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone select the best answer from the choices provided

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.