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You are examining the dna sequences that code for the enzyme phosphofructokinase in skinks and komodo dragons. You notice that the coding sequence that actually directs the sequence of amino acids in the enzyme is very similar in the two organisms but that the surrounding sequences vary quite a bit. What is the most likely explanation for this?

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Answer:

Most likely, skinks and komodo dragons descended from a common ancestor at one point in evolutionary history but then parted in terms of evolution. In fact, this field of science in which the DNA sequences of organisms are compared is known as comparative genomics. The coding sequence that directs the sequence of amino acids in the enzyme was preserved, but the other sequences were altered over time for the skinks and komodo dragons to become more suited to their respective environments.

Explanation:

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