The anwser is true. Exposure to ultraviolet rays can cause skin cells to produce melanin which darkens the surface of your skin into a suntan.
<span>maintaining a stable internal environment</span>
Is it multiple choice or do you just figure out
The evolutionary selection process for glycogen metabolism<span> reflects the requirements of rendering large amounts of glucose into an osmotically stable but readily soluble </span>substrate<span> for rapid mobilization. Therefore glycogen </span>serves<span> as a glucose reserve and </span>substrate<span> buffer for local </span>energy<span> demand.</span>
Normal cells in the body follow an orderly path of growth, division, and death. Programmed cell death is called apoptosis, and when this process breaks down, cancer begins to form.
