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प्रश्न
In case of polyembryony, if an embryo develops from the synergid and another from the nucellus which is haploid and which is diploid?
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उत्तर
The synergid embryo is haploid, and the nucellus embryo is diploid.
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संबंधित प्रश्न
State what is apomixis. Comment on its significance. How can it be commercially used?
Explain any three advantages that seeds offer to angiosperms.
Why are some seeds referred to as apomictic seeds?
State what is apomixis. Write its significance. How can it be commercially used?
How polyembryony can be commercially exploited?
Fill in the blanks:
The male whorl, called the ________ produces ________.
Fill in the blank:
The ________contains the egg or ovum.
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.
Once the pollen reaches the stigma, the pollen tube traverses down the ________ to the ovary where fertilization occurs.
Fill in the blanks:
The ______ are coloured to attract the insects that carry the pollen. Some flowers also produce ______ or ______ that attracts insects.
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?
Give an account of polyembryony.
Which of the following is TRUE with respect to cleavage polyembryony?
Apomixis is a type of reproduction that results is the development of a/an ______.
The occurrence of two or more embryos in one ovule is called ______
Adventive polyembryony in citrus is due to ______.
What is polyembryony and how can it be commercially exploited?
What is pollen grain?
Give reason: Nucellar polyembryony is significant in horticulture.
