CBSE Class 7CBSE
Share
Notifications

View all notifications

Describe the Different Methods of Asexual Reproduction. Give Examples. - CBSE Class 7 - Science

Login
Create free account


      Forgot password?

Question

Describe the different methods of asexual reproduction. Give examples.

Solution 1

The various modes of asexual reproduction in plants are as follows:

1) Vegetative propagation: It is the ability of a plant to produce new plants from roots, stems, leaves, and buds. Vegetative propagation is divided into two types.

Natural vegetative propagation: This type of vegetative propagation occurs easily in nature and involves simple vegetative parts. Potato plant sprouting from an eye is a common example.

Artificial vegetative propagation: This type of vegetative propagation is performed manually and generally occurs in laboratory conditions. The formation of a complete plant from a stem cutting of rose is a common example of this method.

2) Budding: It involves the formation of a new individual from a bulb-like projection called a budThe bud grows and gets detached from the parent to form a new individual. It is commonly observed in yeast.

3) Fragmentation: :It is a form of asexual reproduction where a new organism is formed from the fragments of the parent body. It is the only mode of asexual reproduction in Spirogyra.

4) Spore formation : Many non-flowering plants reproduce through spore formation. Spores are tiny cells protected by a thick wall. Fungi such as bread moulds reproduce asexually using this method.

Solution 2

Different methods of asexual reproduction are:

1) Binary Fission: This process takes place in unicellular organisms. Parent cell elongates and gets divided into two identical daughter cells. Each daughter cell grows into an independent adult.

2) Endospore Formation: In this method the spore wall is formed around a bacterial cell to form an endospore. This endospore germinates to form an active bacterium under favourable conditions.

3) Fragmentation: In this process, body of the organism breaks up into two parts. Then each part grows into a new filament thus forming two organisms from a single one.

4) Spore Formation: The spores are tiny spherical unicellular structures protected by thick wall. The spores are stored in a hard outer covering and this is called sporangium. 

Under favourable conditions the hard cover breaks and spores spread for germination.

5) Budding: In yeast, new organisms are produced by the bud formation from the parent organism. After growing to full size, the bud gets detached and forms a new independent individual.

6) Vegetative propagation: When vegetative parts of a plant like stems, leaves and root etc., give rise to new ones, it is.called vegetative propagation.

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Science Textbook for Class 7 (2018 to Current)
Chapter 12: Reproduction in Plants
Q: 2 | Page no. 141
Solution Describe the Different Methods of Asexual Reproduction. Give Examples. Concept: Modes of Reproduction.
S
View in app×