Answer
This structure surrounds the embryo, protecting and cushioning it.
Work Step by Step
The egg featured is an amniotic egg. The structure labeled A is called the amnion. It is a sac filled with water.
Biology 2010 Student Edition
by Miller, Kenneth R.; Levine, Joseph S.
Published by
Prentice Hall
ISBN 10:
9780133669510
ISBN 13:
978-0-13366-951-0
Chapter 28, Animal Systems II - Assessment - Connecting Concepts - Use Science Graphics/Write About Science - Page 836: 35
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