Answer:
the answer is D
Explanation:
thx to the dude who commented on that awful answer
There are 3 for every codon.
They are related because they are all in the same blood or family you breathe in oxygen and remove carbon dioxide the carbon dioxide it helps other stuff in the ecosystem to survive or live so its like this people breathe oxygen while plants breathe carbon dioxide.
A carbon atom has 4 valence electrons
