What allowed Constantinople to survive the decline of the Roman Empire? A. Its involvement in the silk trade
B. Its use of mercenary soldiers
C. Its disregard for Roman law
D. Its large population of slaves

Hi! after fertilization occurs, the zygote goes through mitosis and then differentiation (aka specialization of cells) to have a variety of cells that perform different functions. this allows for the creation of tissues and so on, all of which were once stem cells with no specific function.i hope i !