Is this a true or false question?
The answer is
c. diffusion only
Phosphorus. It's not abundant, but it's important. There are traces of it in our bones and in the "phospho-lipid bilayer" of the membrane.
Hope that helps!
If the sperm gametes that fertilizes an egg has an XX chromosomes, it will form female offspring. X is a female, XY is a female, Y is a male and XX is a female.