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प्रश्न
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?
उत्तर
Even though each pollen grain has two male gametes, only one male gamete is used for fertilizing an ovule, while the other fuses with the polar nuclei to form the endosperm. Therefore, 20 pollen grains are needed to fertilize 20 ovules, as each pollen grain can fertilize only one ovule.
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संबंधित प्रश्न
What is double fertilisation? Describe the process in brief.
'Formation of primary endosperm nucleus is called triple fusion'. Give reason
Double fertilization is reported in plants of both, castor and groundnut. However, the mature seeds of groundnut are non-albuminous and castor are albuminous. Explain the post fertilization events that are responsible for it.
What happens to the following after fertilization?
Stamens
What are the advantages of the following in the flower to the plant concerned?
Protruding and easily movable anthers
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:
What is the function of the part labelled '4'?
Given ahead is a diagrammatic representation of the process of fertilization. Study the same and then answer the question that follows:
What part does the stigma play in the process of fertilisation?
Pollen tube was discovered by
In double fertilization, the first male gamete fuses with the egg and the second male gan1ete fuses with which of the following?
Double fertilization is characteristic of ______.
