Page No 128:
Question 1:
What is the importance of DNA copying in reproduction?

Page No 128:
Question 2:
Why is variation beneficial to the species but not necessarily for the individual?

Page No 133:
Question 1:
How does binary fission differ from multiple fission?

Page No 133:
Question 2:
How will an organism be benefited if it reproduces through spores?

Page No 133:
Question 3:
Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?

Page No 133:
Question 4:
Why is vegetative propagation practised for growing some types of plants?

Page No 133:
Question 5:
Why is DNA copying an essential part of the process of reproduction?

Page No 140:
Question 1:
How is the process of pollination different from fertilization?

Page No 140:
Question 2:
What is the role of the seminal vesicles and the prostate gland?

Page No 140:
Question 4:
How does the embryo get nourishment inside the mother’s body?

Page No 140:
Question 5:
If a woman is using a copper−T, will it help in protecting her from sexually transmitted diseases?

Page No 141:
Question 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

Question 3:
The anther contains
(a) sepals.
(b) ovules.
(c) carpel.
(d) pollen grains.

Page No 141:
Question 4:
What are the advantages of sexual reproduction over asexual reproduction?

Page No 141:
Question 5:
What are the functions performed by the testis in human beings?

Page No 141:
Question 6:
Why does menstruation occur?

Page No 141:
Question 8:
What are the different methods of contraception?

Page No 141:
Question 9:
How are the modes for reproduction different in unicellular and multicellular organisms?

Page No 141:
Question 10:
How does reproduction help in providing stability to populations of species?

Page No 141:
Question 11:
What could be the reasons for adopting contraceptive methods?