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Q. No.In a type of apomixis known as adventive embryony, embryos develop directly from:
1. Nucellus or integument
2. Zygote
3. Synergids of antipodals of embryo sac
4. Accessory embryo sac in the ovule
Subtopic: Apomixis & Polyembryony |
72%
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The phenomenon observed in some plants wherein parts of the sexual apparatus are used for forming embryos without fertilisation is called
| 1. | Parthenocarpy | 2. | Apomixis |
| 3. | Vegetative propagation | 4. | Sexual reproduction |
Subtopic: Apomixis & Polyembryony |
63%
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Scientists around the world are trying to transfer apomictic genes into hybrid varieties primarily because:
| 1. | cultivation of hybrids has tremendously increased productivity in many important crops. |
| 2. | hybrids are seedless varieties and therefore propagation becomes very difficult. |
| 3. | if seeds from the hybrids are sown, segregation leads to the loss of hybrid characters. |
| 4. | apomixis eliminates the use of seeds in the propagation of plants. |
Subtopic: Apomixis & Polyembryony |
51%
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Nucellar polyembryony:
1. Both I and II are correct
2. Only I is correct
3. Only II is correct
4. Both I and II are incorrect
| I: | is a type of apomixis |
| II: | produces embryos that are genetically identical to the parent plant |
1. Both I and II are correct
2. Only I is correct
3. Only II is correct
4. Both I and II are incorrect
Subtopic: Apomixis & Polyembryony |
79%
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