Q. No.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A):
Seed is the basis of our agriculture.
Reason (R):
Dehydration and dormancy of mature seeds enable them to be stored and used as food throughout the year and also to raise the crop in the next season.
In the light of the above statements, choose the most appropriate answer from the options given below :
1.
(A) is false but (R) is true.
2.
Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.
(A) is true but (R) is false.
4.
Both (A) and (R) are true and (R) is the correct explanation of (A).
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The Plant is:
1. Lupinus arcticus
2. Phoenix dactylifera
3. Cycas revoluta
4. Gnetum
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| Assertion (A): | An apomixis is a form of asexual reproduction that mimics sexual reproduction. |
| Reason (R): | There is no fertilisation in apomicts plants and they do not produce any seeds. |
| 1. | (A) is true but (R) is false. |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is false but (R) is true. |
| 4. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
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| Statement I: | In some apomicts, the diploid egg cell is formed without reduction division and develops into the embryo without fertilisation. |
| Statement II: | In many Citrus and mango varieties, some of the nucellar cells surrounding the embryo sac start dividing, protrude into the embryo sac, and develop into the embryos and this is called as nucellar polyembryony. |
| 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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| 1. | Horticulture | 2. | Plant breeding |
| 3. | Floriculture | 4. | Micropropagation |
| 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 |
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| 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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