Q. No.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%
From NCERT
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Among the terms listed below, those that are not technically correct names for a floral whorl are:
| i. | Androecium | ii. | Carpel |
| iii. | Corolla | iv. | Sepal |
| 1. | i and iv | 2. | iii and iv |
| 3. | ii and iv | 4. | i and ii |
Subtopic: Stamen: Anther |
60%
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Anthers in angiosperms:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | are typically located at the tip of the filament of the stamen. |
| II: | are usually bilobed, each containing pollen sacs called microsporangia. |
| III: | dehisce, or split open, to release mature pollen. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Stamen: Anther | Stamen: Microsporangium |
86%
From NCERT
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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%
From NCERT
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All the following regarding a typical angiosperm anther is correct except:
| 1. | it is bilobed |
| 2. | each lobe has two theca |
| 3. | a transverse groove runs diametrically separating the theca |
| 4. | it is a four-sided (tetragonal) structure consisting of four microsporangia located at the corners, two in each lobe. |
Subtopic: Stamen: Anther |
92%
From NCERT
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Consider the given two statements:
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
| Statement I: | A typical angiosperm anther is bilobed with each lobe having two theca, i.e., they are dithecous. |
| Statement II: | The anther is a four-sided (tetragonal) structure consisting of four microsporangia located at the corners, two in each lobe. |
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 |
94%
From NCERT
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Which of the following would not be true regarding the structure of a typical anther in an angiosperm?
1. Lobes: 2
2. Sides: 4
3. Microsporangia: 4
4. Theca in each lobe: 1
1. Lobes: 2
2. Sides: 4
3. Microsporangia: 4
4. Theca in each lobe: 1
Subtopic: Stamen: Anther |
87%
From NCERT
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A typical microsporangium is generally surrounded by four wall layers where the outer three wall layers perform
the function:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
the function:
| I: | of protection of the developing pollen grain |
| II: | in dehiscence of anther to release the pollen |
| III: | to nourish the developing pollen grains |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Stamen: Anther | Stamen: Microsporangium | Stamen: Male Gametophyte |
90%
From NCERT
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The correct sequence of layers in the wall of an anther from outside to inside is:
| 1. | Tapetum – Middle Layers – Endothecium – Epidermis |
| 2. | Epidermis – Endothecium – Tapetum – Middle layers |
| 3. | Epidermis – Endothecium – Middle layers – Tapetum |
| 4. | Tapetum – Endothecium – Middle layers – Epidermis |
Subtopic: Stamen: Anther | Stamen: Microsporangium |
94%
From NCERT
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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%
From NCERT
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