Q. No.Fusion of two gametes which are dissimilar in size is termed as
| 1. Oogamy | 2. Isogamy |
| 3. Anisogamy | 4. Zoogamy |
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The form and size of algae is highly variable. Which of the following will not be true?
I. Volvox is a colonial alga.
II. Ulothrix and Spirogyra do not form filaments.
III. Kelps form massive plants bodies.
| 1. Only II | 2. Only III |
| 3. Both I and II | 4. Both II and III |
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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 |
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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
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Which of the following is not an example of an edible alga?
| 1. Porphyra | 2. Laminaria |
| 3. Sargassum | 4. Amanita |
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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
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Aplanogametes [gametes that do not have flagella] are the special features of:
1. Spirogyra and Zygnema
2. Spirogyra and Vaucheria
3. Ulothrix and Zygnema
4. Chlamydomanas and Ulothrix
The structure marked as “b” can be used for:
| 1. Photosynthesis 2. Attachment 3. Buoyancy 4. Reproduction |
 |
How many of the given features will be true for brown algae:
I. Presence of xanthophylls
II. A gelatinous coating of algin on cell wall
III. A centrally placed vacuole in plastids
IV. Ribbon shaped biflagellate zoospores
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
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