A nucleotide is made up of a base, a sugar and a phosphate group.
In both DNA and RNA, guanine pairs with cytosine
Answer: Epidermal dendritic cells help prevent infections and they also produce pigment for the skin.
Explanation:
source: study.com
The answer is; activation
The second phase of defense is called the adaptive immune response. It involved the recruitment of white blood cells (leucocytes) (mainly the B- and T- cells). The innate defense system, which is the first response to an invading pathogen, involves the body’s physical barriers such as the skin and mucous membrane.
