How did the Union Pacific Railroad acquire supplies to build the transcontinental railroad? Supplies were brought by covered wagons.
Supplies were shipped up the Missouri River.
Supplies were shipped around South America.
Supplies were available in local towns.

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 !

The answer is option c.