Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 28 - Pregnancy and Human Development - Review Questions - Page 1093: 1(1)

Answer

(a) cleavage

Work Step by Step

Cleavage causes the zygote to divide through mitosis, which at 72 hours has turned the zygote into a ball of cells or blastomeres that is called as a morula.
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