Answer
A
Work Step by Step
The beginning differentiation of cells takes place very early in gestation, specifically during the first trimester.
Campbell Biology (11th Edition)
by Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Published by
Pearson
ISBN 10:
0-13409-341-0
ISBN 13:
978-0-13409-341-3
Chapter 46 - Test Your Understanding - Level 1 - Knowledge/Comprehension - Page 1040: 5
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