How does the function of melanin explain not only the variety of skin colors but susceptibility to skin cancer?

Scientific evidence is most likely to be consistent if it is based on data from

Amajor source of energy for your body comes from

Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. oxygen will diffuse more quickly into cell because . b the oxygen molecules inside cell b have a higher kinetic energy b. a its membrane transport proteins will not be saturated c. a the diffusion gradient there is shallowerd. b the diffusion gradient there is steeper