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Q. No.A root like holdfast, a stem like stipe and a leaf like frond constitutes the plant body in case of
1.
Rhodophyceae
2.
Chlorophyceae
3.
Phaeophyceae
4.
Ferns
Subtopic: Pheophyceae: Brown Algae |
79%
From NCERT
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Which of the following will not be true for the members of Rhodophyceae?
| 1. | Chlorophyll a, d, and Phycoerythrin are present. |
| 2. | Stored food is Floridean starch. |
| 3. | Cell wall is cellulosic, having pectin and polysulphate esters. |
| 4. | Flagellar number and position of insertions is two unequal and lateral, respectively. |
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
87%
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Consider the given two statements.
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement I are correct.
4. Both Statement I and Statement II are incorrect.
| Statement I: | In gymnosperms, the megasporangium develops into a multicellular female gametophyte that bears two or more archegonia. |
| Statement II: | In gymnosperms, archegonia are the female sex organs. |
2. Only Statement II is correct.
3. Both Statement I and Statement I are correct.
4. Both Statement I and Statement II are incorrect.
Subtopic: Gymnosperms |
67%
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Consider the given two statements.
| A: | The pigments used by algae in photosynthesis control how deep they can live in the water. |
| B: | Of the green, brown, and red algae, brown algae are especially adapted for living in deep water. |
| 1. | Only A is true. |
| 2. | Only B is true. |
| 3. | Both A and B are true. |
| 4. | Both A and B are false. |
Subtopic: Algae |
70%
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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%
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%
From NCERT
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Identify the correct statements:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| 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 |
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Algae |
91%
From NCERT
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Protonema is a stage in the life cycle that is:
1. Haploid and is found in mosses
2. Diploid and is found in liverworts
3. Diploid and is found in pteridophytes
4. Haploid and is found in pteridophytes
1. Haploid and is found in mosses
2. Diploid and is found in liverworts
3. Diploid and is found in pteridophytes
4. Haploid and is found in pteridophytes
Subtopic: Bryophytes |
83%
From NCERT
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Thallus like plant body, attached to substratum by rhizoids, requiring water for sexual reproduction and a dominant gametophyte characterise:
| 1. | Pteridophytes | 2. | Gymnosperms |
| 3. | Monocots | 4. | Bryophytes |
Subtopic: Bryophytes |
90%
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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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