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प्रश्न
Give the significance of fertilization.
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उत्तर
Significance of fertilization:
- Fertilization maintains the diploid number of chromosomes in the newly formed zygote.
- It combines characters from two parents bringing about variation in the offspring.
- It determines the sex of the offspring.
- Fertilization introduces centrioles in the cell which are missing in the ovum.
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संबंधित प्रश्न
Mention the function of Seeds.
Differentiate between the following pair:
Efferent duct and sperm duct
Choose the odd one in each of the following:
Sperm; implantation; fertilization; ovum; afterbirth
Rewrite the terms in the correct order so as to be in a logical sequence.
coitus, ovum, Sperm, sperm duct, urethra, Vagina.
State whether the following statement is true or false:
Fertilization occurs in the vagina.
The diagram given below is that of a developing human foetus in the womb. Study the same and answer the question that follow:
What term is given to the period of development of the foetus in the womb?
Write in sequence the regions in which a mature sperm travels from the seminiferous tubules up to the urethral opening?
Give Reasons
Millions of sperms are produced at ejaculation yet one sperm actually fertilizes the ovum. Explain.
Give Reasons
The oviduct funnel is lined with cilia.
Explain the Term Vas deferens.
Give Technical Term:
How much semen is discharged per ejaculation in a man?
Give Technical Term:
What term is used for the production and maturation of sperms in the testes?
Give Technical Term:
The place where fertilization occurs in the female reproductive system.
Give Technical Term:
A method of contraception in which the sperm duct is cut and ligated.
Define.
Fertilization
Identify the function of fertilization membrane.
Which of the following occurs due to the process of capacitation?
Sperms undergo the following changes in the epididymis EXCEPT ______
Name the three main regions of the human sperm, and briefly mention the function of each.
Match the items in column I with those in column II and write down the matching pairs (some may not match).
| Column I | Column II | ||
| (a) | Acrosome | (i) | An embryo which looks like human baby. |
| (b) | Gestation | (ii) | Luteinizing hormone |
| (c) | Menopause | (iii) | Ovum producing cells. |
| (d) | Foetus | (iv) | Semen |
| (e) | Oogenesis | (v) | Spermatozoa |
| (f) | Ovulation | (vi) | Complete stoppage of menstrual cycle. |
| (vii) | Time taken by a fertilised egg till the delivery of baby. |
