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Answers
Answer:
Explanation:
Zygote is formed by the fusion of male and female gamete that is sperm and ovary collectively called gonads .
Placenta hlps to provide nourishment to the embryo or zygote in mothers body .it is attached with help of umblical cord.
At 14 or 15 day after menstruation accordingly after every month .
Parental sex determination is prohibited as it is considered illegal these days .
Hp it hlps uhh..
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Answer:
Explanation:
1.zygote is formed by the fusion of sperm and egg as a result of fertilisation zygote is formed
2.placenta provides oxygen,nutrients to the developing embyo and removes waste material ,co2 from the growing embryo.later from placenta umblical cord arises.
3.The egg erupts from the ovary on the 14th to 16th day of the approximately 28-day menstrual cycle. If not fertilized, the egg is passed from the reproductive tract during menstrual bleeding, which starts about two weeks after ovulation.
4.gonnorhea,syphilis