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Q. No.Assertion(A): Mosses are of great ecological importance.
Reason(R): Mosses are among the first organisms to colonize the rocks.
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: Bryophytes |
76%
From NCERT
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Assertion(A): Species of Sphagnum have good capacity to hold water.
Reason(R): They have been used as packing material for trans-shipment of living material.
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 have been used as packing material for trans-shipment of living material.
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: Bryophytes |
From NCERT
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Assertion(A): Double fertilization is an event unique to angiosperms.
Reason(R): There is an occurrence of two fusions i.e., syngamy and triple fusion.
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): There is an occurrence of two fusions i.e., syngamy and triple fusion.
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: General Account of Angiosperms (OLD NCERT) |
From NCERT
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Assertion(A): Earliest systems of classification separated the closely related species.
Reason(R): Such systems were based on phylogenetic characters.
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): Such systems were based on phylogenetic characters.
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: Classification System |
78%
From NCERT
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Assertion(A): Mosses reduce the impact of falling rain and prevent soil erosion.
Reason(R): Lichens form a dense mat on the soil.
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): Lichens form a dense mat on the soil.
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: Bryophytes |
57%
From NCERT
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Assertion(A): Gymnosperms are called naked-seeded plants.
Reason(R): The seeds remain exposed after their fertilization.
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): The seeds remain exposed after their fertilization.
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: Gymnosperms |
From NCERT
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Thallus level of organisation, rhizoids, dominant gametophyte and dependence on water to complete its life are the characteristics seen in:
| 1. | Pteridophytes | 2. | Gymnosperms |
| 3. | Angiosperms | 4. | Bryophytes |
Subtopic: Bryophytes |
88%
From NCERT
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What is the correct description of a prothallus?
| 1. | A structure in gymnosperms formed just after fertilisation |
| 2. | A sporophytic free living structure formed in pteridophytes |
| 3. | A gametophytic free living structure formed in pteridophytes |
| 4. | Sex organs bearing stage in Bryophytes |
Subtopic: Pteridophytes |
78%
From NCERT
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A ‘protonema’ stage in the life cycle of a moss is the:
| 1. | first stage in gametophyte generation |
| 2. | second stage in gametophyte generation |
| 3. | first stage in sporophyte generation |
| 4. | second stage in sporophyte generation |
Subtopic: Bryophytes |
67%
From NCERT
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Besides starch, pyrenoids in many members of Chlorophyceae, contain:
| 1. | Double-stranded DNA |
| 2. | A low molecular weight RNA |
| 3. | Protein |
| 4. | Lipids |
Subtopic: Chlorophyceae: Green Algae |
87%
From NCERT
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