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:

DNA is composed of four base pairs (A - T, C - G). Codons are sequences of three base pairs. While the same base pairs are used across organisms, the order of codons (which determines the sequence of amino acids in proteins) varies. Different sequences of codons lead to different proteins, which in turn result in the vast variation among organisms.

Answer:

The order of the codons differs between organisms.