Question

4. Describe why variations are observed in the offspring formed by sexual reproduction.

5. Distinguish between pollination and fertilisation.

6. Mention the site and product of fertilisation in a flower

7. .Draw a neat, labelled diagram of a pistil showing pollen tubegrowth and its entry into the

ovule.

8. Distinguish between a gamete and zygote.

9. Draw the diagram of a flower and label the four whorls.

10. Write the names of gamete producing organs in the flower.

11. What is placenta?

12. Mention its role during pregnancy?

13. What are various ways to avoid pregnancy?

14. .How does fertilisation take place? Fertilisation occurs once in a month. Comment.

15. .Reproduction is essentially a phenomenon that is not for survival of an individual but for

the stability of a species. Justify.

16. Describe sexually transmitted diseases and mention the ways to prevent them.

17. Draw the human female reproductive system and label the following parts

i.Which produces egg

ii.Where fertilization takes place

iii. Where implantation of embryo takes place.​

Answer 1

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