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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
Explain any three advantages that seeds offer to angiosperms.
Explain the different ways apomictic seeds can develop, Give an example of each.
Mention one advantage of apomictic seeds to farmers.
Define Apomixis.
How polyembryony can be commercially exploited?
Fill in the blank:
The pollen grains represent the ________.
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:
________is the transfer of pollen grains from the anther of the flower to the stigma of the same or a different flower
Once the pollen reaches the stigma, the pollen tube traverses down the ________ to the ovary where fertilization occurs.
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 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.
Give reason: Nucellar polyembryony is significant in horticulture.
In true polyembryony, where do multiple embryos develop?
What is the origin of embryos in Aristolochia according to embryo sac cell types?
What is the source of polyembryos in Balanophora?
Who proposed the Necrohormone (Neochromosome) Theory and in what year?
According to the Recessive Gene Theory, what controls polyembryony?
Who proposed the Recessive Gene Theory and in what year?
Which of the following is NOT a type of polyembryony in the four-type classification system?
Which of the following is an example of sporophytic cell activation polyembryony?
Which type of polyembryony involves derivatives of two or more megaspore mother cells (MMCs)?
