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3 votes
What is a blastocyst?

a zygote covering to prevent sperm from entering


a solid mass of about one thousand cells


a two-celled developing structure


a sphere of cells surrounding a hollow center

2 Answers

7 votes
It’s a cyst, so I’d believe it would be the second answer.
User Ajay Ahuja
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3 votes

Answer:

I would say A Sphere of cells surrounding a hallow center.

User Zachary Turner
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