RBSE Class 7 Science Notes Chapter 12 Reproduction in Plants

These comprehensive RBSE Class 7 Science Notes Chapter 12 Reproduction in Plants will give a brief overview of all the concepts.

RBSE Class 7 Science Chapter 12 Notes Reproduction in Plants

→ The production of new individuals from their parents is known as reproduction.

→ Roots, stems and leaves are called the vegetative parts of plant.

→ Flowers perform the function of reproduction in plants. Flowers are the reproductive parts.

→ In plants, there are two modes of reproduction, asexual and sexual.

→ In vegetative propagation, new plants are produced from different vegetative parts such as leaves, stems and roots.

→ Sexual reproduction involves the fusion of male and female gametes.

→ Flowers which contain either only pistil or only stamens are called unisexual flowers. For example - corn, papaya, cucumber produce unisexual flowers.

→ Flowers which contain both stamens and pistil are called bisexual flowers. For example - mustard, rose and petunia have bisexual flowers.

→ Anther contains pollen grains which produce male gametes.

→ A pistil/carpel consists of stigma, style and ovary. Ovary contains one or more ovule. The female gamete or the egg is formed in an ovule.

→ The transfer of pollen grains from the anther to the stigma of a flower is called pollination.

→ If the pollen lands on the stigma of the same flower or another flower of a same plant, it is called self-pollination.    

→ When the pollen of the flower lands on the stigma of a flower of a different plant of a same kind, it is called cross-pollination.

→ The process of fusion of male and female gametes (to form a zygote) is called fertilisation. The zygote develops into an embryo.

→ The fruit is a ripened ovary. The seeds develop from the ovules.

→ Seed dispersal helps the plants to

• prevent overcrowding,
• avoid competition for sunlight, water and minerals and
• invade new habitats.