How are dna base pairs found and how are they paired with each other?

The Four Bases

Cytosine pairs with guanine, and adenine pairs with thymine. These are the base pairing rules that allow DNA replication and protein synthesis to happen. A and T are connected by two hydrogen bonds, while C and G are connected by three hydrogen bonds.

Explanation:

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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.