CHAPTER 7 HOW DO ORGANISMS REPRODUCE ? WORKSHEET 7 CBSE BOARD RESULT 100 %

 

HOW DO ORGANISMS REPRODUCE ?

Intext Questions

Page 133:

1. What is the importance of DNA copying in reproduction?
2. Why is variation beneficial to the species but not necessarily for the individual?

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Page 140:
3. How is the process of pollination different from fertilisation?
4. What is the role of the seminal vesicles and the prostate gland?
5. What are the changes seen in girls at the time of puberty?
6. How does the embryo get nourishment inside the mother’s body?
7. If a woman is using a copper-T, will it help in protecting her from sexually transmitted diseases?

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Exercise Questions

Page 141-142:

1. Asexual reproduction takes place through budding in:
   (a) Amoeba
   (b) Yeast
   (c) Plasmodium
   (d) Leishmania

2. Which of the following is not a part of the female reproductive system in human beings?
   (a) Ovary
   (b) Uterus
   (c) Vas deferens
   (d) Fallopian tube

3. The anther contains:
   (a) Sepals
   (b) Ovules
   (c) Pistil
   (d) Pollen grains

4. What are the advantages of sexual reproduction over asexual reproduction?

5. What are the functions performed by the testis in human beings?

6. Why does menstruation occur?

7. Draw a labelled diagram of the longitudinal section of a flower.

8. What are the different methods of contraception? Explain how they prevent pregnancy.

9. How are the modes for reproduction different in unicellular and multicellular organisms?

10. How does reproduction help in providing stability to populations of species?

11. What could be the reasons for adopting contraceptive methods?