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प्रश्न
Answer the following question.
Explain the process of fertilization in humans.
उत्तर
Fertilization involves the fusion of the male and the female gamete. The male and female gametes are released from the male and female reproductive organs. Sperms or male gametes are released from the male reproductive organ i.e., the penis.
These sperms then enter the female body through the vagina.
They travel through the fallopian tubes where they fuse with the eggs in the fallopian tube. Hence, the process of fertilization takes place in the fallopian tubes.
During fertilization, the haploid nucleus of the sperm and that of the ovum fuse with each other to form the zygote. This zygote divides to form an embryo which in turn develops into a foetus.
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संबंधित प्रश्न
Give the importance of variation in survival of species.
Complete the following table to get the differences between asexual and sexual reproduction:
| Characteristics | Asexual Reproduction | Sexual Reproduction |
| Number of parents involved | ........................... | .............................. |
| Type of cells involved | Somatic cells | Germ cells |
| Type of cell division | ............................ | Meiosis and mitosis |
Define Juvenile phase,
Which species is likely to have better chances of survival - the one reproducing asexually or the one reproducing sexually? Justify your answer.
What are gametes?
Name two plants which reproduce by sexual reproduction method and two plants which reproduce by asexual reproduction methods.
The advantage that internal fertilisation has over external fertilisation is that in internal fertilisation :
(a) new off-springs are exactly like the parent
(b) production of large numbers of gametes is unnecessary
(c) copulation and fusion of gametes is passive
(d) fewer individuals are produced
Distinguish between the following pair of terms:
Budding and Regeneration.
How does a single called fertilized egg grows into an adult human body?
Mention the common method of reproduction in Hydra.
Name the organ involved in the following:
Passing of sperms from a man to a woman.
Describe the different methods of asexual reproduction in animals.
Answer in one sentence.
Which glands contribute fluids to the semen?
Answer the following question.
Explain the following parts of male reproductive system along with labelled diagram showing these parts- Testis, vasa deferentia, epididymis, seminal vesicle, prostate gland and penis.
Animals which give birth to young ones directly are named as ______.
Oestrus cycle is seen in ______.
Explain the formation of the embryo.
In telolecithal egg, the yolk is found:
