Question

if the same base pairs are used to code for all organisms, why is there so much variation among organisms?
the order of the codons differs between organisms.
the order of the codons is the same between organisms.
the codons in each organism are the same.
the codons in each organism differ.

Explanation:

All organisms use the same four base pairs (A, T, C, G) to code for proteins. However, the order of these base pairs (codons) varies between organisms. This variation in codon order leads to different sequences of amino acids in proteins, which in turn results in different traits and characteristics among organisms.

Answer:

A. The order of the codons differs between organisms.