MCQ practice · SSC Biology Board questions · Chapter 11: Reproduction in Organisms
What is the embryo called when, at the last stage of cell division, it reaches the uterus?
Think it through first, then pick an option.
- a Implantation
- b Zygote
- c Blastocyst
- d Cleavage
Answer and explanation
Correct answer: c Blastocyst
The embryo that reaches the uterus from the oviduct at the last stage of cell division is called a blastocyst.
Why the other options are wrong
- a Implantation: Implantation is the event of attaching to the uterine wall, not the name of a stage.
- b Zygote: The zygote is the first cell after fertilization, a much earlier stage.
- d Cleavage: Cleavage is the name of the process of cell division, not of the stage of the embryo.
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