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Q. No.Given below are two statements:
Assertion (A):
During life cycle of sexually reproducing plant, there is an alternating of generation
Reason (R):
Alternation of generation occurs between diploid gametophyte and haploid sporophyte
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.
Both (A) and (R) are false.
Subtopic: Life Cycle Patterns in Plants (OLD NCERT) |
60%
From NCERT
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Given below are two statements:
| Assertion (A): | The spread of living pteridophytes is limited and restricted to narrow geographical regions |
| Reason (R): | Multicellular, free-living, mostly photosynthetic thalloid gametophyte of pteridophyte is called prothallus |
| 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. | Both (A) and (R) are false. |
Subtopic: Pteridophytes |
84%
From NCERT
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Given below are two statements:
| Assertion (A): | Bryophytes are called amphibians of plant kingdom |
| Reason (R): | Bryophytes can live in soil but are dependent on water for sexual reproduction |
| 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. | Both (A) and (R) are false. |
Subtopic: Bryophytes |
92%
From NCERT
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Given below are two statements:
| Assertion (A): | In pteridophytes both the gametophytic and sporophytic phases are multicellular and vascular |
| Reason (R): | Pteridophytes exhibit diplontic life cycle pattern |
| 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. | Both (A) and (R) are false. |
Subtopic: Pteridophytes |
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Given below are two statements:
| Assertion (A): | Sexual reproduction may be isogamous anisogamous or oogamous in brown algae |
| Reason (R): | In brown algae, sexual reproduction is accompanied by complex post fertilization developments |
| 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. | Both (A) and (R) are false. |
Subtopic: Pheophyceae: Brown Algae |
65%
From NCERT
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Given below are two statements:
| Assertion (A): | In pteridophytes, the root, stem and leaves possess well-developed vascular tissues. |
| Reason (R): | In pteridophytes, the main plant body is a sporophyte |
| 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. | Both (A) and (R) are false. |
Subtopic: Pteridophytes |
76%
From NCERT
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Given below are two statements:
| Assertion (A): | Water is required for transfer of male gametes to archegonium in ferns |
| Reason (R): | Ferns bear sporangia on gametophytes which in turn bear diploid sex organs |
| 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. | Both (A) and (R) are false. |
Subtopic: Pteridophytes |
From NCERT
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Given below are two statements:
| Assertion (A): | The female sex organ in a flower is the pistil or the carpel |
| Reason (R): | Female gametophyte is also known as embryo sac in flowering plants |
| 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. | Both (A) and (R) are false. |
Subtopic: Life Cycle Patterns in Plants (OLD NCERT) | Gymnosperms |
79%
From NCERT
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Given below are two statements:
| Assertion (A): | In gymnosperms, the male and female gametophytes do not have an independent free-living existence |
| Reason (R): | Gametophytes of gymnosperm remain within the sporangia retained on the sporophytes |
| 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. | Both (A) and (R) are false. |
Subtopic: Gymnosperms |
75%
From NCERT
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Given below are two statements:
| Assertion (A): | Vascular plants are well adapted to the environment and dominate the land |
| Reason (R): | Vascular plants have xylem and phloem for long distance transport |
| 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. | Both (A) and (R) are false. |
Subtopic: Pteridophytes |
72%
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