Fatty acids vary in their degree of saturation or unsaturation due to their number of
a. double bonds
b. calories provided
c. oxygen atoms
d. carbons in the chain
e. methyl groups

B

Explanation:

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.