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Q. No.Identify the correct statements:
I:
Gametes are flagellated and similar in size in Ulothrix
II:
Gametes are non-flagellated and similar in size in Spirogyra
III:
Gametes are dissimilar in size in Eudorina
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Algae |
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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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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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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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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%
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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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Mosses reproduce by vegetative means through:
| 1. | Fragmentation and budding in secondary protonema. |
| 2. | Only budding in secondary protonema but not by fragmentation in secondary protonema. |
| 3. | By adventitious root formation and budding in secondary protonema. |
| 4. | By fragmentation and budding in the sporophyte. |
Subtopic: Bryophytes |
81%
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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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In Chlorophyceae:
1. Only I and III are correct
2. Only II is correct
3. Only I and II are correct
4. I, II and III are correct
| I: | Vegetative reproduction is not seen. |
| II: | Asexual reproduction is by flagellated zoospores. |
| III: | Sexual reproduction is always oogamous. |
2. Only II is correct
3. Only I and II are correct
4. I, II and III are correct
Subtopic: Chlorophyceae: Green Algae |
85%
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