We can get amino acids from eating food that contain proteins.
Proteins are made up of chains of amino acids. During digestion, the proteins are broken down into amino acids.
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I'm guessing all the waste that goes to the ocean can harm them
The rock pocket mice from New Mexico evolved to be darker because of dark lava rock that settled in their territory which happened many years ago. The differences in color of the fur between the mice are driven by natural selection. The rock pocket mice in New Mexico evolved to adapt to their surroundings. This shows that the mutations may happen at random, but natural selection is not.
If i remember correctly, it should be D. A specific amino acid.
Codons make Amino Acids,
Amino Acids make Proteins,
and those Proteins are used for the specific job it was made for.
Hope this helps! :)