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In Angiosperm adventive embryony develops from
- a)Diploid nucellar cells asexually
- b)Diploid nucellar cell sexually
- c)Megaspore mother cell sexually
- d)Any cell of the embryosac asexually
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
In Angiosperm adventive embryony develops froma)Diploid nucellar cells...
Adventive embryony in Angiosperms
Explanation:
Adventive embryony is a phenomenon where embryos are formed asexually from cells other than the egg cell within the ovule. It is a unique characteristic of angiosperms. In angiosperms, adventive embryony primarily develops from diploid nucellar cells.
Development of adventive embryos:
Adventive embryony occurs when certain conditions stimulate the diploid nucellar cells to undergo embryogenesis, resulting in the formation of embryos. These embryos are genetically identical to the parent plant since they are derived from diploid cells.
Role of diploid nucellar cells:
Diploid nucellar cells are located in the nucellus, which is the central part of the ovule. Normally, the nucellus provides nourishment to the developing embryo sac. However, under certain circumstances, some of the diploid nucellar cells are triggered to undergo asexual embryogenesis.
Conditions for adventive embryony:
Adventive embryony can be induced by various factors such as:
1. Hormonal imbalances: Disturbances in the hormonal balance within the plant can trigger the development of adventive embryos.
2. Stress conditions: Environmental stresses like drought, temperature fluctuations, or pathogen attack can stimulate the formation of adventive embryos as a survival mechanism.
3. Genetic factors: Certain genetic mutations or alterations can lead to the production of adventive embryos.
Advantages of adventive embryony:
Adventive embryony provides several advantages to plants, including:
1. Rapid propagation: This asexual mode of reproduction allows plants to produce numerous embryos quickly, increasing their chances of survival and dispersal.
2. Genetic uniformity: Adventive embryos are genetically identical to the parent plant, ensuring the preservation of desirable traits.
3. Adaptation to changing environments: The formation of adventive embryos in response to stress allows plants to adapt and survive in unfavorable conditions.
In conclusion, adventive embryony in angiosperms develops from diploid nucellar cells asexually. This unique phenomenon provides angiosperms with the ability to reproduce rapidly and adapt to changing environmental conditions.
Explanation:
Adventive embryony is a phenomenon where embryos are formed asexually from cells other than the egg cell within the ovule. It is a unique characteristic of angiosperms. In angiosperms, adventive embryony primarily develops from diploid nucellar cells.
Development of adventive embryos:
Adventive embryony occurs when certain conditions stimulate the diploid nucellar cells to undergo embryogenesis, resulting in the formation of embryos. These embryos are genetically identical to the parent plant since they are derived from diploid cells.
Role of diploid nucellar cells:
Diploid nucellar cells are located in the nucellus, which is the central part of the ovule. Normally, the nucellus provides nourishment to the developing embryo sac. However, under certain circumstances, some of the diploid nucellar cells are triggered to undergo asexual embryogenesis.
Conditions for adventive embryony:
Adventive embryony can be induced by various factors such as:
1. Hormonal imbalances: Disturbances in the hormonal balance within the plant can trigger the development of adventive embryos.
2. Stress conditions: Environmental stresses like drought, temperature fluctuations, or pathogen attack can stimulate the formation of adventive embryos as a survival mechanism.
3. Genetic factors: Certain genetic mutations or alterations can lead to the production of adventive embryos.
Advantages of adventive embryony:
Adventive embryony provides several advantages to plants, including:
1. Rapid propagation: This asexual mode of reproduction allows plants to produce numerous embryos quickly, increasing their chances of survival and dispersal.
2. Genetic uniformity: Adventive embryos are genetically identical to the parent plant, ensuring the preservation of desirable traits.
3. Adaptation to changing environments: The formation of adventive embryos in response to stress allows plants to adapt and survive in unfavorable conditions.
In conclusion, adventive embryony in angiosperms develops from diploid nucellar cells asexually. This unique phenomenon provides angiosperms with the ability to reproduce rapidly and adapt to changing environmental conditions.
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In Angiosperm adventive embryony develops froma)Diploid nucellar cells...
Adventive embryony means formation of diploid embryo from a part other than embryo sac(integuments, nucellar)by asexual mode of reproduction.
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In Angiosperm adventive embryony develops froma)Diploid nucellar cells asexuallyb)Diploid nucellar cell sexuallyc)Megaspore mother cell sexuallyd)Any cell of the embryosac asexuallyCorrect answer is option 'A'. Can you explain this answer?
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