Why is the process of fertilisation in angiosperm termed as double fertilisation exlplain?
Answers
Reproductive Structures in Angiosperms
Angiosperms are plants that produce flowers and fruits, and they are the most common types of plants on Earth. Flowers are the reproductive structures of angiosperms. They include four basic parts:
Carpel: Female reproductive structure that makes eggs.
Stamen: Male reproductive structure that makes sperm cells.
Petals: Surround the carpel and stamen and are often brightly colored.
Sepals: Surround the flower petals before it has opened.
During flowering plant reproduction, two structures are created: a zygote and the endosperm. A zygote will grow and develop into an embryo, or baby plant. The endosperm is the plant embryo's food source. This process of forming a zygote and endosperm is called double fertilization, and it is unique to angiosperms.
It is called double fertilisation because the two male gametes that enter into embryo sac, one of it fuses with the polar nucleus that is diploid hence forms triploid endosperm. And the second male gametes fuses with the egg cell forming the diploid zygote. Hence fertilisation in angiosperm is called double fertilisation. Hope it will help you.