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Q. No.Identify the incorrectly matched pair:
Alga
Sexual reproduction
I:
Ulothrix
Isogamous; non-flagellated gametes
II:
Spirogyra
Isogamous; flagellated gametes
III:
Udorina
Anisogamous
IV:
Fucus
Oogamous
1.
Only III
2.
I, II and III
3.
Only I and II
4.
Only III and IV
Subtopic: Algae |
77%
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Consider the given statements:
1. I is correct; II is incorrect; III is incorrect
2. I is incorrect; II is correct; III is correct
3. I is incorrect; II is correct; III is incorrect
4. I is correct; II is incorrect; III is correct
| I: | Algin is a hydrocolloid derived from brown algae |
| II: | Carrageen is a hydrocolloid derived from green algae |
| III: | Agar is a complex polysaccharide derived from red algae, Gelidium and Gracilaria |
1. I is correct; II is incorrect; III is incorrect
2. I is incorrect; II is correct; III is correct
3. I is incorrect; II is correct; III is incorrect
4. I is correct; II is incorrect; III is correct
Subtopic: Algae |
86%
From NCERT
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Which of the following is not an example of an edible alga?
| 1. | Porphyra | 2. | Laminaria |
| 3. | Sargassum | 4. | Amanita |
Subtopic: Algae |
88%
From NCERT
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Consider the two statements regarding Chlorella:
1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Statement I and Statement II are correct
4. Statement I and Statement II are incorrect
| Statement I: | It is single-celled green algae. |
| Statement II: | It is used as a food supplement. |
1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Statement I and Statement II are correct
4. Statement I and Statement II are incorrect
Subtopic: Algae |
88%
From NCERT
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Which of the following will not be true for members of chlorophyceae?
| 1. | The photosynthetic pigments are located within definite chloroplasts. |
| 2. | Chloroplasts are discoid in shape in all members of chlorophyceae. |
| 3. | Most of the members have one or more storage bodies called pyrenoids, which contain proteins besides starch, located in the chloroplasts. |
| 4. | Some green algae may store food in the form of oil droplets. |
Subtopic: Chlorophyceae: Green Algae: I |
81%
From NCERT
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Which of the following feature given in column I is not correctly matched with its correct description given in Column II with respect to members of Chlorophyceae?
| Column I | Column II | |
| 1. | Main photosynthetic pigment | Chlorophyll a, b |
| 2. | Cell wall | Inner layer of cellulose and outer layer of pectose |
| 3. | Stored food | Starch |
| 4. | Flagellar number and insertion | 2-8. unequal. basal |
Subtopic: Chlorophyceae: Green Algae: II |
87%
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Regarding the size and form of brown algae:
1. Both I and II are incorrect
2. Only I is incorrect
3. Only I is correct
4. Both I and II are correct
| I: | Ectocarpus is profusely branched and may reach a height of 100 meters. |
| II: | Kelps are simple branched filamentous brown algae. |
1. Both I and II are incorrect
2. Only I is incorrect
3. Only I is correct
4. Both I and II are correct
Subtopic: Pheophyceae: Brown Algae |
66%
From NCERT
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In brown algae:
1. Both I and II are incorrect
2. Only I is incorrect
3. Only I is correct
4. Both I and II are correct
| I. | Asexual reproduction is by biflagellate zoospores that are pear shaped and have two unequal and laterally attached flagella. |
| II. | The gametes are pyriform [pear shaped] and bear two laterally attached flagella. |
1. Both I and II are incorrect
2. Only I is incorrect
3. Only I is correct
4. Both I and II are correct
Subtopic: Pheophyceae: Brown Algae |
83%
From NCERT
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The leaf like photosynthetic organ in the body of a typical brown alga is called as:
| 1. | Frond | 2. | Stipe |
| 3. | Holdfast | 4. | Rhizoid |
Subtopic: Pheophyceae: Brown Algae |
91%
From NCERT
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Sexual reproduction is oogamous and accompanied by complete post-fertilization developments in the members of:
1. Chlorophyceae
2. Phaeophyceae
3. Rhodophyceae
4. Both Chlorophyceae and Phaeophyceae
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
82%
From NCERT
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