Answer:
from precipitation, oceans lakes streams and soil
there should be an image or something?
B because you can get cancer badly by smoking people smoke cause of stress the stress makes it worse to smoke
Answer:
Like DNA, RNA polymers are make up of chains of nucleotides *. These nucleotides have three parts: 1) a five carbon ribose sugar, 2) a phosphate molecule and 3) one of four nitrogenous bases: adenine, guanine, cytosine or uracil.
Explanation:
ribose + phosphate group + uracil