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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%
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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 |
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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 |
90%
From NCERT
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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 |
51%
From NCERT
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Regarding the given diagram:
| Statement I: | It shows a pollen tetrad. |
| Statement II: | The four microspores are contained by callose walls. |
| 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: Male Gametophyte |
79%
From NCERT
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Study the stages of maturation of microspore into a pollen grain and select the correct statements:
| Statement I: | The spindle formation as seen in A is strictly symmetric. |
| Statement II: | The larger cell [B] is the generative cell and the smaller cell [C] is the vegetative cell. |
| 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: Male Gametophyte |
69%
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Match each item in Table I with one in Table II and select the correct match from the codes given:
Codes:
| Table I: | ||
| A. | B. | C. |
 |
 |
 |
| Table II | |
| P. | A dissected flower of Hibiscus showing pistil where other floral parts have been removed |
| Q. | Multicarpellary, syncarpous pistil of Papaver |
| R. | Multicarpellary, apocarpous gynoecium of Michelia |
Codes:
| A | B | C | |
| 1. | P | Q | R |
| 2. | P | R | Q |
| 3. | Q | R | P |
| 4. | R | P | Q |
Subtopic: Pistil: Female Gametophyte |
91%
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Regarding part I of the diagram:
| Statement I: | A is the Chalazal end. |
| Statement II: | B is the microspore mother cell, C is the microspore dyad and D is the microspore tetrad. |
| 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: Pistil: Ovule |
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Regarding part II of the diagram:
| Statement I: | It shows the two, four, and eighth nucleate stages of the embryo sac. |
| Statement II: | The divisions are mitotic and free nuclear. |
| 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: Pistil: Ovule |
92%
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Regarding part III of the diagram:
The correct statements are:
| Statement I: | It represents mature embryosac or the female gametophyte in an angiosperm. |
| Statement II: | A is the micropylar end and B is the Chalazal end |
| Statement III: | C guides the entry of the pollen tube into the embryo sac. |
| Statement IV: | D is the polar nuclei and E is the central cell. |
| Statement V: | F is the egg cell. |
| Statement VI: | G is the antipodals and H is special cellular thickenings. |
The correct statements are:
| 1. | Statement I, Statement IV, and Statement VI |
| 2. | Statement II, Statement III, Statement IV and Statement VI |
| 3. | Statement I, Statement IV, and Statement V |
| 4. | All Statements are correct |
Subtopic: Pistil: Ovule |
85%
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