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Q. No.Which statement accurately describes the difference between artificial and natural systems of classification?
1.
Artificial systems utilize genetic similarities, whereas natural systems use morphological characteristics.
2.
Artificial systems classify organisms based on a few characteristics, while natural systems consider a large number of characteristics.
3.
Artificial systems classify organisms based on evolutionary relationships, while natural systems focus on ecological roles.
4.
Artificial systems are based on observable characteristics, while natural systems are more theoretical.
Subtopic: Classification System |
60%
From NCERT
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Which of the following statements is true about zoospores and gametes in brown algae?
| 1. | Both zoospores and gametes in brown algae are motile and have equal sized flagella. |
| 2. | Zoospores are non-motile while gametes are motile, both lacking flagella. |
| 3. | Zoospores are motile with two flagella, while gametes are non-motile. |
| 4. | Zoospores and gametes are both motile and similar in the number of flagella. |
Subtopic: Pheophyceae: Brown Algae |
From NCERT
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Consider the given two statements:
| Assertion (A): | Algae can reproduce by fragmentation, a type of asexual reproduction. |
| Reason (R): | Fragmentation involves the body of the algae breaking into pieces, each of which can develop into a complete organism. |
| 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: Algae |
64%
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Consider the given two statements:
| Assertion (A): | Ferns exhibit an alternation of generations where the gametophyte is dominant. |
| Reason (R): | In ferns, the gametophyte is independent and photosynthetic but smaller and less complex than the 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. | (A) is False but (R) is True. |
Subtopic: Pteridophytes |
84%
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Unlike in bryophytes and pteridophytes, in gymnosperms:
| 1. | vascular bundles are not present and hence they are limited to shady and moist habitats. |
| 2. | water is needed for fertilisation and seed formation does not take place. |
| 3. | all members are homosporous. |
| 4. | the male and female gametophytes do not have an independent free-living existence. |
Subtopic: Gymnosperms |
92%
From NCERT
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In red algae:
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
| I: | Phycoerythrin is a major photosynthetic pigment. |
| II: | Floridean starch is stored food. |
| III: | Cell wall contains polysulphate esters. |
| IV: | Flagella are 2, unequal with lateral insertion. |
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
91%
From NCERT
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Which structure is involved in the reproduction of gymnosperms?
1. Flowers
2. Cones
3. Sporangia
4. Sori
1. Flowers
2. Cones
3. Sporangia
4. Sori
Subtopic: Gymnosperms |
70%
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Which of the following features is characteristic of brown algae?
| 1. | Presence of chlorophyll a and c, and fucoxanthin |
| 2. | Cell walls made up entirely of cellulose |
| 3. | Predominantly found in terrestrial habitats |
| 4. | Absence of flagella in all life cycle stages |
Subtopic: Pheophyceae: Brown Algae |
94%
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Cycas does not have:
1. I and II only
2. I and IV only
3. II and IV only
4. I and III only
| I. | Coralloid roots |
| II. | Branched stems |
| III. | Pinnate persistent leaves |
| IV. | Male cones and megasporophylls borne on same plant |
2. I and IV only
3. II and IV only
4. I and III only
Subtopic: Gymnosperms |
79%
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In the life cycle of moss bryophytes, which stage bears the sex organs?
1. Seta of the sporophyte
2. Leafy stage
3. Capsule of the sporophyte
4. Protonema stage
1. Seta of the sporophyte
2. Leafy stage
3. Capsule of the sporophyte
4. Protonema stage
Subtopic: Bryophytes |
66%
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