Answer:
I think that the answer would be D
Because of the fact that female mammals have chromosomes from both parents (from the father and from the mother) and all cells have the same inactivated X chromosome female mammals are considered to be mosaic <span>of the maternal and paternal cells.</span>
The correct answer that would best complete the given statement above is "morphology". Sometimes the form or appearance of an organism is studied to determine a taxon. The scientist is using morphology. Morphology is a branch of biology, which studies about the form of living organisms and its relationship between their structures.
The systems are:
Nervous system: this is because the brain sends out commands to the body or it signals other parts which makes your body move like walk or to pick something up.
Muscular system: the muscular system such as your bones and muscles is what keeps the bones together so you could move/walk.
Hope this helped :)
Have a great day
