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प्रश्न
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 happens to the part labelled '5' during the process?
उत्तर
During germination of the pollen grain, part '5' (generative nucleus) present at the tip of the pollen tube divides into two sperm nuclei. The pollen tube enters one of the synergids and releases its two sperm nuclei. Of these, one sperm nucleus enters the egg cell and fuses with its nucleus, while the other sperm nucleus moves towards the two polar nuclei in the central cell and fuses with them.
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संबंधित प्रश्न
'Formation of primary endosperm nucleus is called triple fusion'. Give reason
Fill in the blanks with suitable words.
Transference of pollen grains from anthers to stigma of the same flower is called ________.
Name of the part of the ovary which gives rise to:
Seed ______
What are the advantages of the following in the flower to the plant concerned?
Smooth and light pollen
What is the function of the pollen tube? Explain it with the help of a diagram.
Given ahead is a diagrammatic representation of the process of fertilization. Study the same and then answer the question that follows:
What is the function of the synergids?
Caruncle develops from
In double fertilization, the first male gamete fuses with the egg and the second male gan1ete fuses with which of the following?
Due to which of the following reasons the pollen tube usually grows down towards the egg?
Identify the CORRECT statement with reference to cellular endosperm.
