The answer to this is the last option i think
Answer:
Nitrogen
Explanation:
The nitrogenous bases of the two separate polynucleotide strands are bound together, according to base pairing rules (A with T and C with G), with hydrogen bonds to make double-stranded DNA.
Answer:
The best to adapted because they already know how to survive through the toughest situations instead of being fit which leads them to nowhere but death
have a good day :)
Explanation:
The answer would be Biochemistry