Answer:
D
Explanation:
Fossils tell us where they came from.
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A nucleic acid is made of nucleotides, and nitrogenous bases are a part of a nucleotide.
DNA is a nucleic acid. The nucleotides in DNA are made up of a sugar (deoxyribose), a phosphate group, and one nitrogenous base (which will be either adenine, guanine, cytosine, or thymine).
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Carbohydrate is the answer
They rely on glucose (sugar) as It's energy source....
