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Q. No.Arranging the following in the correct developmental sequence related to microsporogenesis:
Choose the correct answer from the options given below:
| A. | Microspore tetrads |
| B. | Sporogenous tissue |
| C. | Pollen grains |
| D. | Pollen mother cells |
| 1. | D, A, C, B | 2. | B, D, C, A |
| 3. | B, D. A, C | 4. | A, D, C, B |
Subtopic: Stamen: Microsporangium |
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Which one of the following is a triploid cell ?
| 1. | Central cell | 2. | Primary endosperm cell |
| 3. | Zygote | 4. | Synergid |
Subtopic: Double Fertilization |
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Which one of the following types of pollination brings genetically different types of pollen grains to the stigma?
1. Geitonogamy
2. Autogamy
3. Xenogamy
4. Cleistogamy
1. Geitonogamy
2. Autogamy
3. Xenogamy
4. Cleistogamy
Subtopic: Pollination & Outbreeding Devices |
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Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the correct from the options given below:
| Assertion (A): | A typical unfertilised, angiosperm embryo sac at maturity is 8-nucleate and 7-celled. |
| Reason (R): | The egg apparatus has 2 polar nuclei. |
| 1. | (A) is True but (R) is False. |
| 2. | (A) is False but (R) is True. |
| 3. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 4. | Both (A) and (R) are true but (R) is not the correct explanation of (A) |
Subtopic: Pistil: Female Gametophyte |
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Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the correct answer from the options given below.
| Assertion (A): | Both wind and water pollinated flowers are not very colourful and do not produce nectar. |
| Reason (R): | The flowers produce enormous amount of pollen grains in wind and water pollinated flowers. |
| 1. | (A) is True but (R) is False. |
| 2. | (A) is False but (R) is True. |
| 3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
Subtopic: Pollination & Outbreeding Devices |
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How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant?
1. 1 Meiosis and 3 Mitosis
2. No Meiosis and 2 Mitosis
3. 2 Meiosis and 3 Mitosis
4. 1 Meiosis and 2 Mitosis
1. 1 Meiosis and 3 Mitosis
2. No Meiosis and 2 Mitosis
3. 2 Meiosis and 3 Mitosis
4. 1 Meiosis and 2 Mitosis
Subtopic: Pistil: Female Gametophyte |
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
In light of the above statement, choose the most appropriate answer from the options given below:
| Assertion (A): | Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus. |
| Reason (R): | The presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells. |
| 1. | (A) is True but (R) is False. |
| 2. | (A) is False but (R) is True. |
| 3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
Subtopic: Stamen: Microsporangium |
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Identify the set of correct statements:
Choose the correct answer from the options given below:
1. A, B, C and D only
2. A, C, D and E only
3. B, C, D and E only
4. C, D and E only
| A: | The flowers of Vallisneria are colourful and produce nectar. |
| B: | The flowers of waterlily are not pollinated by water. |
| C: | In most of water-pollinated species, the pollen grains are protected from wetting. |
| D: | Pollen grains of some hydrophytes are long and ribbon like. |
| E: | In some hydrophytes, the pollen grains are carried passively inside water. |
1. A, B, C and D only
2. A, C, D and E only
3. B, C, D and E only
4. C, D and E only
Subtopic: Pollination & Outbreeding Devices |
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Identify the correct description about the given figure:
| 1. | Water pollinated flowers showing stamens with mucilaginous covering. |
| 2. | Cleistogamous flowers showing autogamy. |
| 3. | Compact inflorescence showing complete autogamy. |
| 4. | Wind pollinated plant inflorescence showing flowers with well exposed stamens. |
Subtopic: Pollination & Outbreeding Devices |
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The junction between ovule and funicle is represented by :
| 1. | Nucellus | 2. | Integument |
| 3. | Chalaza | 4. | Hilum |
Subtopic: Pistil: Ovule |
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