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Q. No.Gametes in Spirogyra are:
1. flagellated and similar in size
2. flagellated and dissimilar in size
3. non-flagellated and dissimilar in size
4. non-flagellated and similar in size
Subtopic: Algae |
77%
From NCERT
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Which of the following options most accurately describes algae in general?
| 1. | Algae are chlorophyll-bearing, thalloid, autotrophic and largely aquatic (both fresh water and marine) organisms. |
| 2. | Algae are chlorophyll-bearing, having highly differentiated body, autotrophic and exclusively found in fresh water organisms. |
| 3. | Algae are chlorophyll-bearing or parasitic heterotrophic organisms, thalloid and largely marine organisms. |
| 4. | Algae are chlorophyll-lacking, thalloid, autotrophic and largely saprophytic organisms found in both fresh and marine waters. |
Subtopic: Algae |
94%
From NCERT
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Pyrenoids:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | are found in chloroplasts of many algae. |
| II: | contain protein besides starch. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae: II | Chlorophyceae: Green Algae: III |
74%
From NCERT
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Identify the correct match:
1. Only I
2. Only II and III
3. Only III
4. I, II and III
| I: | Green algae | 2-8 flagella; equal in length and apical in insertion |
| II: | Brown algae | Food stored as floridean starch |
| III: | Red algae | Pear-shaped gametes bearing two laterally attached flagella |
2. Only II and III
3. Only III
4. I, II and III
Subtopic: Algae |
88%
From NCERT
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All the following belong to phaeophyceae except:
1. Ectocarpus
2. Polysiphonia
3. Dictyota
4. Laminaria
1. Ectocarpus
2. Polysiphonia
3. Dictyota
4. Laminaria
Subtopic: Pheophyceae: Brown Algae |
91%
From NCERT
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One of the commercial products obtained from Gelidium and Gracilaria and which is used to grow microbes and in preparations of ice-creams and jellies is:
1. Agar
2. Algin
3. Carrageen
4. Inulin
1. Agar
2. Algin
3. Carrageen
4. Inulin
Subtopic: Algae |
92%
From NCERT
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Consider the given two statements:
| Assertion (A): | Bryophytes are called amphibians of the plant kingdom. |
| Reason (R): | Bryophytes play an important role in plant succession on bare rocks. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are False. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
Subtopic: Bryophytes |
86%
From NCERT
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Gemmae are:
1. Asexual buds found in liverworts
2. Sex organs in mosses
3. Resting zygote in many fungi
4. Endospores of certain bacteria
1. Asexual buds found in liverworts
2. Sex organs in mosses
3. Resting zygote in many fungi
4. Endospores of certain bacteria
Subtopic: Bryophytes | Bryophytes (Liverworts) | Bryophytes (Anthoceropsida) |
95%
From NCERT
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What would be true regarding structures labelled as A and B in the given diagram of Funaria, a moss?
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | A is the gametophyte and B is the sporophyte. |
| II: | The ploidy of cells in A will be haploid and the ploidy of cells in B will be diploid. |
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Bryophytes |
71%
From NCERT
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Evolutionarily, the first terrestrial plants to possess vascular tissues – xylem and phloem, are:
1. Bryophytes
2. Pteridophytes
3. Gymnosperms
4. Angiosperms
1. Bryophytes
2. Pteridophytes
3. Gymnosperms
4. Angiosperms
Subtopic: Pteridophytes |
94%
From NCERT
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