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Q. No.In the diagrammatic representation of L.S. of a flower:
| Statement I: | A is anther and collectively anthers form the androecium of the flower. |
| Statement II: | B is the site for landing of pollens during pollination, C is style, and D after fertilisation becomes a fruit. |
| 1. | Statement I is correct, Statement II is correct |
| 2. | Statement I is incorrect, Statement II is correct |
| 3. | Statement I is correct, Statement II is incorrect |
| 4. | Statement I is incorrect, Statement II is incorrect |
Subtopic: FLOWER – A FASCINATING ORGAN OF ANGIOSPERMS |
76%
Level 2: 60%+
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Cultivation of flowering and ornamental plants for gardens and for commerce and trade is called:
| 1. | Horticulture | 2. | Plant breeding |
| 3. | Floriculture | 4. | Micropropagation |
Subtopic: FLOWER – A FASCINATING ORGAN OF ANGIOSPERMS |
67%
Level 2: 60%+
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Consider the following statements regarding floral primordium:
| I: | It is formed at the shoot apical meristem |
| II: | The development of flowers is dependent on genetics, PGR, and environmental conditions. |
Of the two statements:
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect. |
Subtopic: Stamen: Anther |
86%
Level 1: 80%+
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In an angiosperm, the structure that develops and becomes a pollen sac is called:
| 1. | Megasporophyll | 2. | Megasporangium |
| 3. | Microsporangium | 4. | Microsporophyll |
Subtopic: Stamen: Microsporangium |
74%
Level 2: 60%+
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A typical angiosperm anther is:
1. Bilobed and polythecous
2. Unilobed and monothecous
3. Multilobed and monothecous
4. Bilobed and dithecous
Subtopic: Stamen: Anther | Stamen: Microsporangium |
95%
Level 1: 80%+
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Given below is a three-dimensional cut section of an anther:
| Statement I: | The bilobed nature of an anther is very distinct in the given section. |
| Statement II: | The anther is a two-sided [bigonal] structure consisting of four microsporangia located at the corners, two in each lobe. |
| 1. | Statement I is correct, Statement II is correct. |
| 2. | Statement I is incorrect, Statement II is correct. |
| 3. | Statement I is correct, Statement II is incorrect. |
| 4. | Statement I is incorrect, Statement II is incorrect. |
Subtopic: Stamen: Anther |
Level 3: 35%-60%
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The layers in the walls of the microsporangium that helps in the dehiscence of anther to release the pollen include:
| I: | Epidermis |
| II: | Endothecium |
| III: | Middle layers |
| IV: | Tapetum |
| 1. | I and II only | 2. | I, II, and III only |
| 3. | II and III only | 4. | I, II, III, and IV |
Subtopic: Stamen: Microsporangium |
83%
Level 1: 80%+
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Tapetum:
| 1. | is the outermost layer in the wall of microsporangium |
| 2. | helps in the protection of the pollen grains |
| 3. | helps in dehiscence of anther |
| 4. | has cells that generally have more than one nucleus |
Subtopic: Stamen: Anther |
82%
Level 1: 80%+
Hints
Identify A-D in the given enlarged view of one microsporangium showing wall layers:
| A | B | C | D | |
| 1. | Epidermis | Endothecium | Middle layers | Tapetum |
| 2. | Epithelium | Endothelium | Middle layers | Tapetum |
| 3. | Endothecium | Epidermis | Tapetum | Middle layers |
| 4. | Epithelium | Endothelium | Tapetum | Middle layers |
Subtopic: Stamen: Microsporangium |
92%
Level 1: 80%+
Hints
The given diagram shows a mature dehisced anther.
| Statement I: | This process is coordinated precisely with pollen differentiation, floral development, and flower opening. |
| Statement II: | Anther dehiscence is the final function of the anther that causes the release of pollen grains. |
| 1. | Both Statement I and Statement II are True and Statement II is the correct explanation of Statement I. |
| 2. | Both Statement I and Statement II are True but Statement II is not the correct explanation of Statement I. |
| 3. | Statement I is True but Statement II is False. |
| 4. | Statement I is False but Statement II is True. |
Subtopic: Stamen: Microsporangium |
50%
Level 3: 35%-60%
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