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प्रश्न
Answer the following question.
When a seed of orange is squeezed, many embryos, instead of one are observed. Explain how it is possible.
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उत्तर
It is due to polyembryony.
The occurrence of more than one embryos in a seed is called as POLYEMBRYONY.
In orange, the nucellar cells, synergid, or integument cells develop into a number of embryos of different sizes.
eg: Citrus.
- Sometimes the formation of more than one egg in an embryo sac can lead to polyembryony.
APPEARS IN
संबंधित प्रश्न
Explain any three advantages that seeds offer to angiosperms.
Explain the different ways apomictic seeds can develop, Give an example of each.
State what is apomixis. Write its significance. How can it be commercially used?
Fill in the blank:
________takes place when one male gamete and the egg fuse together. The fertilized egg grows into a seed from which the new plants can grow.
Fill in the blank:
The ______ is the base of the flower to which other floral parts are attached.
Match the column.
| Column - I (Structure before seed formation) |
Column - II (Structure after seed formation) |
||
| A. | Funiculus | I. | Hilum |
| B. | Scar of ovule | II. | Tegmen |
| C. | Zygote | III. | Testa |
| D. | Inner integument | IV. | Stalk of seed |
| V. | Embryo | ||
Adventive polyembryony in citrus is due to ______.
Which plants exhibit adventive (nucellar) polyembryony?
Which of the following is NOT a type of polyembryony in the four-type classification system?
Which type of polyembryony involves derivatives of two or more megaspore mother cells (MMCs)?
