O Levels Biology (5090)•5090/12/O/N/19

Explanation
Implantation occurs in the uterus
Steps:
- Recall that fertilization typically happens in the fallopian tube after ovulation.
- The zygote travels down the fallopian tube toward the uterus over 3-4 days.
- Implantation is the process where the blastocyst embeds into the uterine lining.
- Identify the diagram label for the uterus as the site.
Why C is correct:
- By definition, implantation occurs in the endometrium of the uterus, where the blastocyst attaches for pregnancy development.
Why the others are wrong:
- A: Ovary produces eggs but does not support implantation.
- B: Fallopian tube is for fertilization and transport, not embedding.
- D: Cervix connects uterus to vagina but lacks the lining for implantation.
Final answer: C
Topic: Sexual reproduction in humans
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