Dogs, cats, ferrets, seals, elephants, mustelids and bears own the "Zonary" placentae.
Answer:
DNA
Explanation:
RNA is not a double helix
Uracil is on the RNA, this is a picture or DNA. Uracil is just one of the nucleic bases
This is not a monomer; it's actually a polymer
It is DNA because it is a double helix structure held together by the four nucleic bases.
D. it is cool because when u exercise u swet. so it is better in the cold.