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प्रश्न
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.
उत्तर
Though double fertilisation is reported in both groundnut and castor, their mature seeds are different with respect to endosperm. The post-fertilisation events of them are as follows:
- The primary endosperm nucleus repeatedly divides to give rise to free nuclei. This stage of development is called free nuclear endosperm.
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Cell wall formation occurs next, resulting in a cellular endosperm.
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At this stage, the endosperm may either be fully consumed by the growing embryo (non-albuminous seeds) as in the case of groundnut or be retained in the mature seed as in the case of castor and be used later in seed germination (albuminous seeds).
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संबंधित प्रश्न
What is double fertilisation? Describe the process in brief.
What is triple fusion?
(a) Explain the events after pollination leading to the formation of a seed in angiosperms.
(b) Mention the ploidy levels of the cells of different parts of an albuminous seed.
Explain the Following Term:
Ornithophily
Explain the following term:
Elephophily
What happens to the following after fertilization?
Petals
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 representation of the process of fertilization. Study the same and then answer the question that follows:
What happens to
i) Ovary
ii) Ovule after fertilisation
Explain double fertilization and its significance.
The seed is a fertilized _______.
Male gametes in angiosperms are formed by the division of ______.
Transmitting tissue is found in
Pollen tube was discovered by
Which of the following is the CORRECT sequence of events during double fertilization in Angiosperms?
By which of the following the megasporangium proper of an angiosperm ovule is represented?
In a breeding experiment, the selected male parent is diploid and the female parent is tetraploid. What will be the ploidy level of the endosperm that will develop after double fertilisation?
Double fertilization is fusion of ______.
After fertilization, the seed coat of seeds develops from ______
Select the option that shows the correctly identified 'U', 'X', 'Y' and 'Z' in a developing dicot embryo.
