C. evaporation of sweat warms the body
If I were you I would choose muscles it seems right to me although I might be wrong. Hope this helped some! ;)
A film of water covers the gametophyte
There is 50% probability that their daughter's son will have the disease, because daughter chromosomes are XX , and the X from father will have x- linked disease, now in next generation the son will have XY chromosomes, Y is from father and X will from mother, now mother have two "XX", out of these two one carry x- linked disease, that means 50 percent chances of having disease in son.
Yes ..................................
