Answer:
The zygote divides, ultimately forming a hollow bundle of cells.
Step-by-step explanation:
Once a zygote divides, it begins to rapidly divide. It first forms a ball of cells before forming a hollow bundle of cells called blastocyst.
When the sperm meets the egg during sexual reproduction, a zygote is formed. This single-cell zygote is the first step of a much more complex multi-cellular organism.
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