Explain the role of vitamins in the body and why they are not a source of energy

Answer & Explanation:

Vitamins are not a source of energy, but rather, function as helpers in many body processes. They do everything from act as coenzymes to help digest food to build bone, to help with iron absorption. Many vitamins have specialty purposes. For example, vitamin D helps build bone along with calcium.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.