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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.
Explain the different ways apomictic seeds can develop, Give an example of each.
Define Apomixis.
State what is apomixis. Write its significance. How can it be commercially used?
Fill in the blank:
The pollen grains represent the ________.
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.
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?
Adventive polyembryony in citrus is due to ______.
What is pollen grain?
Give reason: Nucellar polyembryony is significant in horticulture.
What is the origin of embryos in Aristolochia according to embryo sac cell types?
Which embryo typically survives in polyembryonic seeds?
Who proposed the Necrohormone (Neochromosome) Theory and in what year?
According to the Recessive Gene Theory, what controls polyembryony?
Based on the discovery information provided, in which year was polyembryony first observed in Citrus?
Which theory explains polyembryony through the release of chemical stimuli from degenerating cells?
