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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
What is meant by sexual reproduction?
What are the advantages of sexual reproduction over asexual reproduction?
Give two differences between a zygote and a foetus.
Name the male and female gametes in animals.
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
Define the term Implantation.
Differentiate between the following:
Sperm and Ovum
Define the term Adolescence.
“The chromosomes number of the sexually reproducing parents and their offspring is the same.” Justify this statement.
Explain why variations are observed in the offsprings of sexually reproducing organisms?
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.
Describe the histology of testis with help of labelled diagram.
What are the different stages of sexual reproduction?
Differentiate between the following:
Regeneration in lizard and Planaria
Choose the correct answer from the options given below:
Which of the following statements, support the view that elaborate sexual reproductive process appeared much later in the organic evolution.
- Lower groups of organisms have simpler body design
- Asexual reproduction is common in lower groups
- Asexual reproduction is common in higher groups of organisms
- The high incidence of sexual reproduction in angiosperms and vertebrates
The zygote divides repeatedly into a group of cells, which develops into different tissues and organs constituting a full body. This structure is known as ______.
What is external fertilisation?
What are oviparous animals?
Reproduction is essentially a phenomenon that is not for survival of an individual but for the stability of a species. Justify.
Suggest a possible explanation why the seeds in a pea pod are arranged in a row, whereas those in tomato are scattered in the juicy pulp.
