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Grade 7 CBSE
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Science
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Reproduction in Plants
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Reproduction in Plants Notes
› Sexual reproduction
Sexual reproduction
SEXUAL REPRODUCTION
In plants, sexual reproduction is carried out only in flowering plants.
Flowers are the reproductive organs of a plant.
Usually a flower contains both male and female reproductive cells called
gametes
in one flower.
Such flowers are also called
complete or bisexual flowers
.
When flowers have either male gametes or female gametes, they are called incomplete or unisexual flowers.
Such type of flower is found in corn and papaya plants.
Complete flowers have all the four parts: sepals, petals, stamens, and pistils.
Stamens (male organ):
They bear the anthers that contain pollen grains.
Pollen grains have male gametes in them.
Pistil (female organ):
The pistil is divided into a stigma, style, and ovary.
The ovary contains the female gametes, called
ovules
.
In sexual reproduction, seeds are formed.
New plants develop from these seeds.
Mature plants flower, and the flower after pollination and fertilization becomes a fruit.
Fruits may have one or more seeds inside them.