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Maurinko [17]
3 years ago
12

PLEASE ANSWER THIS NO NEED TO EXPLAIN JUST CORRECT ANSWER!!!

Biology
1 answer:
Nady [450]3 years ago
7 0
Summer. . Z z z ....
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LekaFEV [45]
I think the correct answer would be A. The yolk sac becomes the placenta. It is membranous sac that is attached to the embryo. It provides all the nutrition and the blood cells needed by the embryo. It is also called the umbilical vesicle.
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What is most noticeable structural difference between rna and dna?
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Explanation:

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