NCERT Solutions for Class 10 Science Unit 8

How do Organisms Reproduce? Class 10

Unit 8 How do Organisms Reproduce? Exercise Solutions

Reproduction is an integral feature of all living beings. The process by which a living being produces its own like is called reproduction.

Importance of Reproduction : Reproduction is important for each species, because this is the only way for a living being to continue its lineage. Apart from being important for a particular individual, reproduction is also important for the whole ecosystem. Reproduction helps in maintaining a proper balance among various biotic constituents of the ecosystem. Moreover, reproduction also facilitates evolution because variations come through reproduction; over several generations.
<< Previous Chapter 7 : Control and Coordination Next Chapter 9 : Heredity and Evolution >>

Question : Solutions of Questions on Page Number : 128

Q1 :  

What is the importance of DNA copying in reproduction?


Answer :

DNA (Deoxyribonucleic acid) is the genetic material found in the chromosomes, which are present in the nucleus of a cell. The DNA is the information site for making proteins and each specific type of protein leads to a specific type of body design.

Thus, it is the DNA molecule that determines the body design of an individual. Therefore, it can be concluded that it is the DNA that gets transferred from parents to offsprings and makes them look similar.

DNA determines body structure

Answer needs Correction? Click Here

Q2 :  

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


Answer :

Variations are beneficial to the species than individual because sometimes for a species, the environmental conditions change so drastically that their survival becomes difficult. For example, if the temperature of water increases suddenly, then most of the bacteria living in that water would die. Only few variants that are resistant to heat would be able to survive. However, if these variants were not there, then the entire species of bacteria would have been destroyed. Thus, these variants help in the survival of the species. However, all variations are not necessarily beneficial for the individual organisms.

Answer needs Correction? Click Here

Q3 :  

How does binary fission differ from multiple fission?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q4 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q5 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q6 :  

Why is vegetative propagation practised for growing some types of plants?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q7 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q8 :  

How is the process of pollination different from fertilization?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q9 :  

What is the role of the seminal vesicles and the prostate gland?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q10 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q11 :  

How does the embryo get nourishment inside the mother's body?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q12 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
<< Previous Chapter 7 : Control and Coordination Next Chapter 9 : Heredity and Evolution >>

Exercise : Solutions of Questions on Page Number : 141

Q1 :  

Asexual reproduction takes place through budding in

(a) amoeba.

(b) yeast.

(c) plasmodium.

(d) leishmania.


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q2 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q3 :  

The anther contains

(a) sepals.

(b) ovules.

(c) carpel.

(d) pollen grains.


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q4 :  

What are the advantages of sexual reproduction over asexual reproduction?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q5 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q6 :  

Why does menstruation occur?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q7 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q8 :  

What are the different methods of contraception?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q9 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q10 :  

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


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q11 :  

What could be the reasons for adopting contraceptive methods?


Answer :

Please Register/Login to get access to all solutions Facebook Login
<< Previous Chapter 7 : Control and Coordination Next Chapter 9 : Heredity and Evolution >>

Science : CBSE NCERT Exercise Solutions for Class 10th for How do Organisms Reproduce? will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

Popular Articles
Question
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9
Question 10
Question 11
Question 12
Exercise
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9
Question 10
Question 11