D. They come from other living things
Explanation:
The cell theory states that all living things come from preexisting cells.
True is your answer your welcome
Sex linkage is a phenotypic expression where certain traits are expressed together with the sex gene. They are said to be linked to the sex genes. These include, Colour blindness, hemophilia among other traits. In this case if the mother is a carier (XcXC) and the father who is normal (XcY). This means the offsprings will be a carier daughter ,normal daughter, normal son and a color blind son.
The main storage reservoir for water on earth is ground water
