NCERT solutions Science Textbook for Class 10 chapter 8 How do Organisms Reproduce



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Chapter 8 - How do Organisms Reproduce

Page 127

State the importance of DNA copying.

Q 1 | Page 127 | view solution

Why is variation beneficial to the species but not necessarily for the individual?

Q 2 | Page 127 | view solution

Page 133

Write two differences between binary fission and multiple fission in a tabular form.

Q 1 | Page 133 | view solution

 How will an organism be benefited if it reproduces through spores?

Q 2 | Page 133 | view solution

Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?

Q 3 | Page 133 | view solution

List two advantages of vegetative propagation.

Q 4 | Page 133 | view solution

Why is DNA copying an essential part of the process of reproduction?

Q 4 | Page 133 | view solution

Page 140

How is the process of pollination different from fertilization?

Q 1 | Page 140 | view solution

Write the functions of the following organs of reproduction:
a. Ovaries
b. Seminal vesicle and prostate glands

Q 2 | Page 140 | view solution

What are the changes seen in girls at the time of puberty?

Q 3 | Page 140 | view solution

Page 141

Asexual reproduction takes place through budding in
(a) amoeba.
(b) yeast.
(c) plasmodium.
(d) leishmania.

Q 1 | Page 141 | view solution

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

Q 2 | Page 141 | view solution

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

Q 3 | Page 141 | view solution

What are the advantages of sexual reproduction over asexual reproduction?

Q 4 | Page 141 | view solution

List two functions performed by the testis in human beings.

Q 5 | Page 141 | view solution

 Why does menstruation occur?

Q 6 | Page 141 | view solution

 What are the different methods of contraception?

Q 8 | Page 141 | view solution

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

Q 9 | Page 141 | view solution

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

Q 10 | Page 141 | view solution

What could be the reasons for adopting contraceptive methods?

Q 11 | Page 141 | view solution

Extra questions

Draw a well-labelled diagram of longitudinal section of a flower.

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Explain how the embryo gets nourishment inside the mother’s body.

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 If a woman is using a copper-T, will it help in protecting her from sexually transmitted diseases?

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