During intercourse, the penis ejaculates sperm, produced in the testes, into the vagina. Some of the sperm makes their way to the uterus where, if they encounter an egg to fertilize, unite with the ovum to form a fertilized egg or zygote. The zygote then may implant in the uterus and eventually develop into a fetus.
Which of the following indicates the correct reproductive sequence?
none of these are correct |
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zygote → ovum → fetus |
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ovum → fetus → zygote |
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ovum → zygote → fetus |