Answer:
the 4th one The lumen, is my guess
A nucleotide consists of three things: A nitrogenous base, which can be either adenine, guanine, cytosine, or thymine (in the case of RNA, thymine is replaced by uracil). A five-carbon sugar, called deoxyribose because it is lacking an oxygen group on one of its carbons. One or more phosphate groups.
Natural Selection.
It favors the better adapted organisms.
A target cell respond to a hormone because it bears receptors
Answer: The answer is, use of fertilizers (manure) in farming this is on study island
Explanation:
