how do some chemicals increase the risk of a person getting cancer?

a. by causing cell mutations

b. by causing a deficiency of vitamin d

c. by causing an increase of toxins in the skin

d. by causing a decrease in the immune system

i it is d i hope it

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%