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In double fertilisation
- a)One male gamete fuses with the egg and the other fuses with the secondary nucleus
- b)One male gamete fuses with the antipodal, while the other fuses with the diploid nucleus
- c)Two male gametes fuse with two eggs
- d)One male gamete fuses with the egg, while the other fuses with the antipodal
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
In double fertilisationa)One male gamete fuses with the egg and the ot...
Double fertilisation is a unique process that occurs only in flowering plants. It involves the fusion of two male gametes with two female gametes to produce a zygote and an endosperm. The correct option is (A), one male gamete fuses with the egg and the other fuses with the secondary nucleus.
Process of Double Fertilisation
Double fertilisation occurs in the embryo sac of a flower, which contains the female gametes. The process can be divided into two steps:
First Step: Pollination
During pollination, the male gametes are transferred from the pollen grains to the stigma of the flower. The pollen tube grows down the style and enters the ovary where the embryo sac is located. The pollen tube releases two male gametes into the embryo sac.
Second Step: Fertilisation
In the embryo sac, there are two types of female gametes - the egg and the two polar nuclei. One male gamete fuses with the egg to form a zygote, which will develop into an embryo. The other male gamete fuses with the two polar nuclei to form a triploid nucleus, which will develop into the endosperm.
The Correct Option (A)
In double fertilisation, one male gamete fuses with the egg and the other fuses with the secondary nucleus. The secondary nucleus is also known as the central cell, which contains the two polar nuclei. The fusion of the male gamete with the secondary nucleus forms the triploid nucleus, which develops into the endosperm. The endosperm provides nourishment to the developing embryo.
Conclusion
Double fertilisation is a unique process that occurs only in flowering plants. It involves the fusion of two male gametes with two female gametes to produce a zygote and an endosperm. In double fertilisation, one male gamete fuses with the egg and the other fuses with the secondary nucleus to form the endosperm.
Process of Double Fertilisation
Double fertilisation occurs in the embryo sac of a flower, which contains the female gametes. The process can be divided into two steps:
First Step: Pollination
During pollination, the male gametes are transferred from the pollen grains to the stigma of the flower. The pollen tube grows down the style and enters the ovary where the embryo sac is located. The pollen tube releases two male gametes into the embryo sac.
Second Step: Fertilisation
In the embryo sac, there are two types of female gametes - the egg and the two polar nuclei. One male gamete fuses with the egg to form a zygote, which will develop into an embryo. The other male gamete fuses with the two polar nuclei to form a triploid nucleus, which will develop into the endosperm.
The Correct Option (A)
In double fertilisation, one male gamete fuses with the egg and the other fuses with the secondary nucleus. The secondary nucleus is also known as the central cell, which contains the two polar nuclei. The fusion of the male gamete with the secondary nucleus forms the triploid nucleus, which develops into the endosperm. The endosperm provides nourishment to the developing embryo.
Conclusion
Double fertilisation is a unique process that occurs only in flowering plants. It involves the fusion of two male gametes with two female gametes to produce a zygote and an endosperm. In double fertilisation, one male gamete fuses with the egg and the other fuses with the secondary nucleus to form the endosperm.
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In double fertilisationa)One male gamete fuses with the egg and the other fuses with the secondary nucleusb)One male gamete fuses with the antipodal, while the other fuses with the diploid nucleusc)Two male gametes fuse with two eggsd)One male gamete fuses with the egg, while the other fuses with the antipodalCorrect answer is option 'A'. Can you explain this answer?
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