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प्रश्न
Explain the process of fertilization.
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उत्तर
Process of fertilization in humans:
- Formation of zygote by union of sperm and ovum is called as fertilization.
- Fertilization is internal in humans. Semen is ejaculated in vagina during copulation.
- Sperms, in the numbers of few millions, start their journey by the route of vagina – uterus – oviduct.
- One of those few million sperms fertilizes the only ovum present in the oviduct.
Process of fertilization in plants:
- Stigma becomes sticky during pollination.
- The pollen grain germinates over the stigma and gives rise to pollen tube.
- Pollen tube carries two male gametes which are released near egg cell present in the embryo sac.
- One male gamete fuses with a female gamete giving rise to zygote. The second male gamete fuses with two polar nuclei giving rise to endosperm. This is called as double fertilization.
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संबंधित प्रश्न
The figure given alongside represents the female reproductive system of a mammal.
Name the parts labelled A - D
One egg is released from each of the two ovaries every month.
Give appropriate term of the following:
The attachment of developing zygote (blastocyst) on the uterine wall.
Name the following:
Organ where fertilization occurs.
Name the following:
Fusion of sperm and ovum.
Complete the following statement by choosing the correct alternative:
Fertilization occurs in ______.
The diagram given below is that of a developing human foetus in the womb. Study the same and answer the question that follow:
How many days does the foetus take to be fully developed?
How is the fetus protected?
Give a labeled structure of ovum.
Give Technical Term:
What term is used for the production and maturation of sperms in the testes?
Give Technical Term:
Rupture of the follicle and release of the ovum from the ovary.
Complete the following sentences with appropriate word:
Fertilization of the human egg by the sperm normally occurs in the_______
Write the functional activity of the following structure:
Seminal vesicles
Describe the process of fertilization.
What is sex chromosomes?
What are the functions of each hormone in the neurohypophyseal hormone?
Choose the odd one out from the group of terms given below and write the category for the remaining terms:
