How many chromosomes in a normal skin cell would be maternal sex chromosomes?
A. 1
B. 2
C. 22
D. 23

Which process can increase the rate of greenhouse gas emissions into the atmosphere in response to a decrease in albedo

Long term exposure to waves can cause sunburns and skin cancer.

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?