In sexually-reproducing organisms, a sperm cell unites with an egg cell during fertilization.
Then, the fertilized egg, or zygote, undergoes _______ to form a massive ball of identical cells. Finally, the cells become specialized in structure and function through the process of _______.
A.
cell differentiation; cell division
B.
meiosis; mitosis
C.
mitosis; meiosis
D.
cell division; cell differentiation