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Q. No.Consider the given two statements:
Assertion (A):
Nocturnal flowers are pollinated by moths.
Reason (R):
Nocturnal flowers are highly fragrant and dull in colour
1.
Both (A) and (R) are True and (R) is the correct explanation of (A).
2.
Both (A) and (R) are True and (R) is not the correct explanation of (A).
3.
(A) is True, (R) is False.
4.
Both (A) and (R) are False
Subtopic: Pollination & Outbreeding Devices |
51%
Level 3: 35%-60%
Hints
Which of the following statement(s) is/are correct about pollination?
Choose the correct answer from the options given below:
1. A only
2. B only
3. A and B and C only
4. B and D only
| A. | Wind pollinated flowers have a single ovule in each ovary |
| B. | Both wind and water pollinated flowers do not produce nectar |
| C. | Bees are the dominant biotic pollinating agents |
| D. | In geitonogamy transfer of pollen grains from anther to the stigma of another flower of different plant takes place |
1. A only
2. B only
3. A and B and C only
4. B and D only
Subtopic: Pollination & Outbreeding Devices |
91%
Level 1: 80%+
Hints
| Assertion (A): | The megaspore mother cell divide mitotically to produce four spores. |
| Reason (R): | Megaspore mother cells are diploid and megaspore is haploid. |
| 1. | Both (A) & (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) & (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
66%
Level 2: 60%+
Hints
Match the following and choose correct option
Option
1. A-1,B-ii, C-iii, D-iv
2. A-ii, B-I, C-iv, D-iii
3. A-iv, B-ii, C-I, D-iii
4. A-ii, B-iv, C-I, D-iii
| Group-A | Group-B |
| A. Aleurone layer | i. without fertilization |
| B. Parthenocarpic fruit | ii. Nutrition |
| C. Ovule | iii. Double fertilization |
| D. Endosperm | iv. Seed |
Option
1. A-1,B-ii, C-iii, D-iv
2. A-ii, B-I, C-iv, D-iii
3. A-iv, B-ii, C-I, D-iii
4. A-ii, B-iv, C-I, D-iii
Subtopic: Endosperm |
93%
Level 1: 80%+
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| Assertion (A): | Hybrids are widely used in cultivation to increase productivity and apomixes can be an important tool for maintaining hybrid nature. |
| Reason (R): | Seeds produced by apomictic plants are identical to mother plant as there is no segregation |
| 1. | Both (A) & (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) & (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true statement but (R) is false. |
| 4. | Both (A) and (R) are false statements. |
Subtopic: Apomixis & Polyembryony |
76%
Level 2: 60%+
Hints
| Assertion (A): | The hybrid seeds have to be produced every year. |
| Reason (R): | It shows the segregation of characters. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True and (R) is not the correct explanation of (A). |
| 3. | (A) is True, (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Apomixis & Polyembryony |
76%
Level 2: 60%+
Hints
Assertion(A): Sporopollenin is one of the most resistant organic materials, and protects the pollen grain.
Reason(R): Pollen grains are well preserved as fossils.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
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. (A) is false, but (R) is true.
Reason(R): Pollen grains are well preserved as fossils.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
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. (A) is false, but (R) is true.
Subtopic: Stamen: Anther |
52%
Level 3: 35%-60%
Hints
Assertion(A): The distribution of bryophytes and pteridophytes is limited.
Reason(R): They depend on water for the sexual mode of reproduction.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
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. (A) is false, but (R) is true.
Reason(R): They depend on water for the sexual mode of reproduction.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
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. (A) is false, but (R) is true.
Subtopic: Pollination & Outbreeding Devices |
91%
Level 1: 80%+
Hints
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Assertion(A): Active research is going on to transfer apomictic genes into hybrid varieties.
Reason(R): Production of hybrid seeds is a costly affair.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
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. (A) is false, but (R) is true.
Reason(R): Production of hybrid seeds is a costly affair.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
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. (A) is false, but (R) is true.
Subtopic: Apomixis & Polyembryony |
Level 3: 35%-60%
Hints
Consider the given two statements:
| Assertion (A): | Angiosperms exhibit double fertilisation. |
| Reason (R): | Two fusion events; syngamy and triple fusion occur in microsporangium. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 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. | (A) is False but (R) is True. |
Subtopic: Double Fertilization |
62%
Level 2: 60%+
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