Answer:
a. methylation at lysine 9 or 27 of histone H3.
Explanation:
Methylation causes the switching off of genes using steric hinderance to prevent access to DNA.
Answer:
A polyp is a small clump of cells that form in the colon. Most of the time they are harmless but they could develop to be colon cancer which is the reason the polyp needed to be removed.
Explanation:
It should be A. It is universal among all life on Earth.
The change is harsh on birds. Food supplies goes down and birds can become ill from the disease