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In this blog, you will get solution of NCERT class 10 Biology How do organisms reproduce. Stay tune with us. From this blog you can refer to those questions given in the textbook.

How do organisms reproduce? NCERT solutions

Question 1

Asexual reproduction takes place through budding in

a). Amoeba

b). Yeast

c). Plasmodium

d). Leishmania

Ans:- (b) Yeast

Question 2

Which of the following is not a part of the female reproductive system in human beings?

a). Ovary

b). Vas deference

c). Uterus

d). Fallopian tube

Ans:-(C) Vas deference

Question 3

The anther contains

a). Sepals

b). Ovules

c). Pistil

d). Pollen grains

Ans:- (d) Pollen grains

Question 4

Water advantages of sexual reproduction over asexual reproduction?

Answer:-

In asexual reproduction, the offsprings are almost identical to their parents because they have the same genes as of their parents. Thus, genetic variation is not possible or is slow in asexual reproduction. Sexual reproduction involves fusion of male and female gametes coming from both the parents. Therefore, the office spring receive some genes from the mother and some from the father. The mixing of this Genes of mother and father in various different combinations, results in the offspring having genetic variation.

Thus, we conclude that sexual reproduction promotes diversity of characters in the of springs by providing genetic variations.

Question 5

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

Answer:- The function of testes is to produce a sperm and male sex hormone called testosterone. The scrotum provides the optimal temperature for formation of sperms.

Question 6

Why does menstruation occurs?

Answer:- Menstruation Aakash in human females only when the egg is not fertilized by the male sperms. Since the egg is not fertilized so that thick and soft uterus lining having a lot of blood capillaries in it is not required. Thus, the unfertilized egg disintegrats within a day and the uterus lining also break down. As the uterus lining contents a lot of blood vessels, so when it is shed, blood along with other tissues is released. This comes out of vagina in the form of bleeding.

Question 7

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

Question 8

What are the different methods of contraception?

Answer:- A number of preventive methods or devices have been developed to prevent unwanted pregnancy full stop this methods are broadly categorised as:

• Barrier methods

• Chemical methods

• Surgical methods

Question 9

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

Ans:- The unicellular organisms have only one cell. There is no separate tissue for reproduction. So, they can reproduce asexually by the process of fusion or budding as in Yeast. On the other handy multicellular organism contains various cells and have separate system for reproduction. So, they can reproduce by both sexual and asexual reproduction.

Question 10

How does reproduction help in providing stability to the population of species?

Ans:- The consistency of DNA copying during reproduction is important for maintenance of body design features that allow the organisms to live in a particular area. This consistency of DNA copying provide estability to the population of species. Reproduction is responsible for continuation of a species.

Question 11

What could be the reasons for adopting contraceptive methods?

Ans:- The reasons for adopting contraceptive methods are:-

• Protection from sexually transmitted disease.

• restricting the number of children in a family.

• sufficient gap between successive births.

• enjoying good reproductive health.

• controlling population. etc.

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