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प्रश्न
Explain double fertilization and its significance.
उत्तर
In angiosperms, during fertilization, one male gamete fuses with the egg cell and forms diploid zygote in a process called syngamy. The other male gamete fuses with the two polar nuclei to form a triploid nucleus called the primary endosperm nucleus. This process is called triple fusion. Since fertilization takes place twice here, so this process is called double fertilization.
Significance - Due to double fertilization, the triploid nucleus develops into endosperm which serves as nutrition for embryo.
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संबंधित प्रश्न
Where and how does triple fusion take place?
Give one word/term for the following:
When pollen grains of a flower reach the stigma of the same flower.
What happens to the following after fertilization?
Petals
Given ahead is a diagrammatic sketch of the sectional view of a germinating pollen grain. Study the same and then answer the question that follows:
Name the parts labelled 1, 2, 3, 4 and 5.
What happens to the ovary post fertilization?
Even though each pollen grain has 2 male gametes, why at least 20 pollen grains are required to fertilize 20 ovules in a particular carpel?
Define triple fusion.
Identify the CORRECT statement with reference to cellular endosperm.
The total number of nuclei involved in double fertilisation in angiospersm are ______.
In ______ sepal is seen on the fruit after fertilization.
