Biology

The correct answer is: D.Changing the amino acid that a codon codes for

Explanation:

A substitution mutation involves the replacement of one base pair with another in the DNA sequence. The consequence of this can be:

Changing the amino acid that a codon codes for: If the substitution occurs in a coding region of the gene, it can change the codon, which could lead to the incorporation of a different amino acid in the protein (this is known as a missense mutation). This change can affect the protein's structur...