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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.
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.
Mention one advantage of apomictic seeds to farmers.
State what is apomixis. Write its significance. How can it be commercially used?
Fill in the blank:
The ________contains the egg or ovum.
Fill in the blank:
The ______ is the base of the flower to which other floral parts are attached.
Fill in the blank:
The whorl ________is green that protects the flower until it opens.
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 | ||
What is adventive polyembryony?
Which of the following is TRUE with respect to cleavage polyembryony?
Adventive polyembryony in citrus is due to ______.
