Answer:
option D is correct
Explanation:
RNA is a type of nucleic acid which is composed of single strand of nucleotide
<span>The dinosaurs and the mammals appeared during the Triassic period, roughly 225 million years ago. The dinosaurs went extinct 65 million years ago. The Mesozoic Era lasted about 180 million years, and is divided into three periods, the Triassic, the Jurassic, and the Cretaceous.</span>
Answer:
abiotic factors.
Explanation:
they are not living things