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प्रश्न
Define the following:
Spermatogenesis
उत्तर
Spermatogenesis: The production and development of sperms is called spermatogenesis.
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संबंधित प्रश्न
Given below is a portion of the diagram to show the diagrammatic highly magnified view of a single human sperm. Complete the diagram to show its normal structure.
What happens to uterus if fertilization takes place? And what happens to uterus if fertilization does not take place?
Give Reasons
Millions of sperms are produced at ejaculation yet one sperm actually fertilizes the ovum. Explain.
Give Technical Term:
Rupture of the follicle and release of the ovum from the ovary.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Fertilization is the product of the egg nucleus and the sperm nucleus.
Explain the mechanism of fertilization in humans.
Give scientific reason.
The new individual produced by sexual reproduction always has the recombined genes of both the parents.
What would be the effect if meiosis did not occur in nature?
State whether the following statement is True or False. If false, correct the statement :
The eggs of fish are covered by hard shells for protection.
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. |
