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Science TNSB Mentoring
Class 10
Reproduction in plants and animals
Reproduction in Human Beings
4.
Fertilization and stages of post fertilization
Question:
2
m.
Choose the correct answer
:
1
.
An oocyte is alive for approximately __________.
\(24\) hours
\(48\) hours
2
.
The blastomeres rearrange into an outer layer of smaller cells called __________.
trophoblast
inner cell mass
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