Answer:
alveoli please leave brainliest
Answer:
colorblidness is carried on the X cromasome. since it is resessive it can be covered up. woman have 2 X cromasomes so both have to have it or she wont be color blind. men only have one X cromasome so its more likely that their just one X can have it
Explanation:
Answer:
Variations are caused by mutation. random mating between organisms.
Explanation:
Im going to have to go with C. they pass through channels in the cell membrane
the answer is B :) youre welcome
