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biology unit 2 - area of study 1
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Question:
What is a yolk sac
Author: Olive JohnsonAnswer:
The yolk sac is a small, membranous structure situated outside of the embryo with a variety of functions during embryonic development - very small in humans and other animals are viviparous) - larger in animals that are oviparous and ovoviparous as the embryo gets its nutrients from the sac
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Author
Olive Johnson