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प्रश्न
Mention one advantage of apomictic seeds to farmers.
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उत्तर
Embryos formed through apomixis are generally free from infections.
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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?
Define Apomixis.
Answer the following question.
When a seed of orange is squeezed, many embryos, instead of one are observed. Explain how it is possible.
State what is apomixis. Write its significance. How can it be commercially used?
The ______ collect the pollen grains.
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:
________is the transfer of pollen grains from the anther of the flower to the stigma of the same or a different flower
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 | ||
The polyembryony commonly occurs in ______.
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?
The plant part which consists of two generations, one within the other-
- Pollen grains inside the anther.
- Germinated pollen grain with two male gametes.
- Seed inside the fruit.
- Embryo sac inside the ovule
Choose the correct option.
Explain following term:
Polyembryony
