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प्रश्न
Put a tick mark (✓) against the correct alternative in the following statement:
Identify the stage which is formed after the fertilisation of the egg by the sperm?
विकल्प
Ovule
Foetus
Embryo
Zygote
उत्तर
Zygote
APPEARS IN
संबंधित प्रश्न
Why is it important that a very large number of sperms should be present in the semen ?
Describe the functions of the following:
Testis
Mention the exact location of the following :
Testis
Given on the right is a diagram which represents the reproductive organs of a man:
(i) Write the names of the parts numbered 1 to 16.
(ii) Give two functions of the part 6.
(iii) Name three components of the fluid which may be found in the tube labeled 2.
(iv) What is the main function of the part labelled 3?
The diagram shown below is the lateral section of the testis of man. Study it carefully and answer the questions that follow:
(i) Label the part I to 4 of the diagram.
(ii) State the functions of the parts labeled 1 and 2.
Explain the term Androgens.
What is the enzyme present in the acrosome of sperm?
Identify the accessory sex gland consisting of 20-30 separate lobes and secreting about 30% of semen.
Give two reasons for the appearance of variations among the progeny formed by sexual reproduction.
Match the items given in Column I with the most appropriate ones in Column II and rewrite the correct matching pairs:
| Column I | Column II | ||
| (a) | Leydig Cells | 1. | Lack of thyroxine in children |
| (b) | Stoma | 2. | 12 pairs |
| (c) | Ova | 3. | Testosterone |
| (d) | Cranial nerve | 4. | Diffusion of respiratory gases |
| (e) | Cretinism | 5. | Haploid cells |
| 6. | 31 Pairs | ||
| 7. | Diploid cells |
