<span>b. a cell takes in DNA from outside the cell.</span>
Answer:
The answer is D.
Explanation:
Colour blindness is affected by the genes in our DNA not X chromosome.
(Correct me if I am wrong)
Capillaries<span> are </span>small<span>, thin </span>blood vessels<span> that connect the </span>arteries<span> and the veins. Their thin walls allow oxygen, nutrients, carbon dioxide and waste products to pass to and from the tissue cells.</span>
Lymphocytes generated during an initial infection that circulate in the body for years and quickly destroy that infection if it ever appears again are called the Memory t cells. These cells are a subset of infection that have previously encountered and responded to their respective antigen, thus they may be called the antigen experienced t cells.
