Answer:
Kettlewell thought that if natural selection caused the change in the moth population, the following must be true: Heavily polluted forests will have mostly dark peppered moths. Clean forests will have mostly light peppered moths. Dark moths resting on light trees are more likely than light moths to be eaten by birds.
Nucleotides. They are the building blocks of DNA.
Vitamins. A lot of coenzymes are derivatives os vitamins especially B vitamins.
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Answer:
b. amount of energy available as fuel for the body