1. the answer is B
2. the answer is D
Answer:
two
Explanation:
Double-stranded RNA (dsRNA) is RNA with two complementary strands, similar to the DNA found in all cells, but with the replacement of thymine by uracil.
The eruption of Mount Saint Helens has proved to have dramatically change the abiotic and biotic factors of its environment. As what was shown in the image just 24 years from its eruption, we can already observe that animal life began to populate the region due to its sufficient vegetation.
D. Bright Echo with a comet tail or ring down artifact. I hope this helps, my sister is a nurse so I know a few things.
No the earth is extremely dynamic and changes dramatically