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Q. No.Syngamy in angiosperms results in the formation of:
1. A haploid cell 2. A diploid cell 3. A triploid cell 4. A polyploid cell
Subtopic: Double Fertilization |
87%
From NCERT
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The outer hard layer of the pollen wall is made up of:
| 1. | Callose, which is easily digested by enzymes |
| 2. | Sporopollenin, which is resistant to all enzymes |
| 3. | Hemicellulose, which is difficult to digest by enzymes |
| 4. | Calcium pectate, which is easily digested by enzymes |
Subtopic: Stamen: Microsporangium |
96%
From NCERT
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In over 60 % of angiosperms, pollen grains are shed at:
| 1. | 2-celled stage | 2. | 3-celled stage |
| 3. | 4-celled stage | 4. | 1-celled stage |
Subtopic: Stamen: Male Gametophyte |
88%
From NCERT
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The body of the ovule fuses with the funicle in the region called:
| 1. | Chalaza |
| 2. | Micropyle |
| 3. | Hilum |
| 4. | Nucellus |
Subtopic: Pistil: Ovule |
90%
From NCERT
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Division of functional megaspore can be described as:
| 1. | Three free nuclear mitotic divisions. |
| 2. | One meiotic and two mitotic divisions, all free nuclear. |
| 3. | Three cytoplasmic mitotic divisions. |
| 4. | One meiotic and two mitotic divisions, meiotic being cytoplasmic and mitotic being free nuclear. |
Subtopic: Pistil: Ovule |
63%
From NCERT
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Transfer of pollens from the anther to the stigma of the same flower is called:
| 1. | Autogamy | 2. | Geitonogamy |
| 3. | Xenogamy | 4. | Cleistogamy |
Subtopic: Pollination & Outbreeding Devices |
91%
From NCERT
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Majority of plants:
| 1. | Use abiotic agents for pollination |
| 2. | Use biotic agents for pollination |
| 3. | Do not use any agent for pollination |
| 4. | Use both abiotic and biotic agents for pollination. |
Subtopic: Pollination & Outbreeding Devices |
73%
From NCERT
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Pollens grains are long ribbon-like and are carried passively in water in:
| 1. | female plants remain submerged in water |
| 2. | male plants remain submerged in water |
| 3. | both male and female plants remain submerged in water |
| 4. | both male and female plants reach the surface of the water. |
Subtopic: Pollination & Outbreeding Devices |
From NCERT
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Pollen tube, after reaching the ovary, enters the ovule through _______ and then enters one of the _____________ through filiform apparatus.
| 1. | Chalaza; Synergids | 2. | Micropyle; Antipodals |
| 3. | Micropyle; Synergids | 4. | Chalaza; Antipodals |
Subtopic: Pistil: Ovule |
90%
From NCERT
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Double fertilization is:
| 1. | Seen in some flowering plants |
| 2. | In seen in many flowering plants |
| 3. | Is seen in both flowering and non-flowering plants |
| 4. | Is a unique event of flowering plants |
Subtopic: Double Fertilization |
84%
From NCERT
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