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Reproduction in Plants ( Class - VII)

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Contents

Topic


Reproduction in Plants (class VII) Science


Objectives


After completion of this topic you will be able to

  • identify different parts of a flower.


  • understand various types of reproduction in plant




Introduction


Reproduction
The main characteristic of all living things is reproduction.The production of new individuals from their parents is known as Reproduction. BUT, HOW DO PLANTS REPRODUCE ? [Click here google]

Modes of Reproduction

Sexual reproduction


  • Reproduction with the help of sex organs are called sexual reproduction.
  • Flowers are the reproductive parts of a plant .

File:Parts_of_flowers.jpg

Pollination

Transfer of pollen grains from anther to stigma of a flower is called pollination

Self Pollination

The transfer of pollengrains from anther to stigma of the same flower is called self pollination


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File:1.3.1 Flower - Male Parts

Cross Pollination

Transfer of anther to stigma of the flower in the different plant or different flower in the same plant is cross pollination.




Fertilisation

Fusion of male and female gamete is called Fertilisation and the cell which results after it is called a Zygote

Asexual reproduction

New plants are obtained without production of seeds or spores.

Vegetative Propagation

It is a type of asexual reproduction in which new plants are produced from the vegetative parts of the plant.Example - Rose

Budding

Small bulb like projection coming out from some single celled organism that gradually grows and gets detached from parent cell and forms a new organism.Example - Yeast

Fragmentation

During fragmentation an Organism breaks up into fragments and these fragments or pieces grow into new individuals.Example - Spirogyra




Spore Formation


The spores are asexual reproductive bodies. Under favourable conditions, spore germinates and develops into a new individual.Example - Fungus

Activity

Points added for a correct answer:  
Points for a wrong answer:
Ignore the questions' coefficients:

1. Yeast reproduces by ?

Spore Formation.
Budding.
Fragmentation.
Vegetative propagation.

2. Male reproductive part of a flower is ?

Stamen.
Pistil.
Carpel.
Petal.

3. Pollination is the transfer of pollen from?

Ovary to sepal.
Anther to Stigma.
Petal to petal
Sepal to petal

Your score is 0 / 0


summary


  • All living Organisms reproduce their own kind.


  • In Plants there are two modes of reproduction- sexual and Asexual.


  • Flower is the reproductive part of a plant.


  • Pollination is the transfer of pollen grains from the Anther to the Stigma of the same or another flower.


  • The fusion of male and female gametes is called Fertilisation.


References


1 CBSE Textbook of class VII
2 youtube.com
3 googleimage.

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