Q. No.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.
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| 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 |
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| 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. |
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| 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. |
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| 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 |
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| 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 |
| A | B | C | |
| 1. | P | Q | R |
| 2. | P | R | Q |
| 3. | Q | R | P |
| 4. | R | P | Q |
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| 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 |
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| 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 |
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| 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 |
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| Statement I: | Cleistogamous flowers have an advantage and a disadvantage over chasmogamous flowers. |
| Statement II: | Seed set is assured even in the absence of pollinators but the amount of genetic variations is less in cleistogamous flowers when compared to the chasmogamous flowers. |
| 1. | Statement I is correct; Statement II is correct but Statement II does not explain Statement I. |
| 2. | Statement I is correct; Statement II is correct and Statement II explains Statement I. |
| 3. | Statement I is correct but Statement II is not correct. |
| 4. | Both Statement I and Statement II are not correct. |
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