Question

Double fertilization- Describe in detail.

Answer 1

Double fertilization is a characteristic feature of flowering plants. In the process of double fertilization out of the two spermnucleus, one sperm nucleus fuses with theegg nucleus to form an embryo ( process is called syngamy) and another fuses with polar nuclei to form endosperm ( process is called triple fusion). Since two kinds of fusion—syngamy and triple fusion—take place, the process is known as double fertilisation.No it is not known as cross pollination, When the pollen grain is transferred from the anther of one flower to the stigma of flower of another plant, it is termed as cross pollination.

Answer 2

Dear Student,

◆ Double fertilization -

• In angiosperms, one sperm cell fertilizes egg cell to form a zygote and one sperm cell combines with polar nuclei to form endosperm. This is called double fertilization.

# Significance of double fertilization -

• Endosperm develops only if ovum is fertilized.
• Endosperm gives nourishment to the developing embryo.
• It results in rapid multiplication of plants.

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