Question

the hollow collection of undifferentiated cells that occurs after fertilization and initial mitosis is called a

Answer 1

Blastocyst

Step-by-step explanation:

Penn foster

Answer 2

Blastula

Step-by-step explanation:

This mass of cell – called blastomere- surrounds a fluid-filled cavity-blastocoele- formed in the very early stages of development of an embryo in animals, after fertilization and the formation of a zygote. Blastomere cells have high potency and can differentiate into any type of cell.