At what stage of development is the embryo a hollow ball of identical cells?
1 answer:
Answer: blastula
Explanation: an animal embryo at the early stage of development when it is a hollow ball of cells.
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I don't know at all im lost
The answer would be B , I think
Answer:
1. A
2. B
3. B, C, D
4. C, D
5. E
6. C and D
... I think
