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
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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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| 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 |
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1. Major pigments are chlorophyll a, c, fucoxanthin
2. Food is stored as complex carbohydrates which may be in the form of Laminarin or Mannitol
3. Vegetative cells have chitinous wall usually covered on the outside by a gelatinous coating of algin
4. Flagellar number and insertions are 2, unequal and lateral
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| 1. | Frond | 2. | Stipe |
| 3. | Holdfast | 4. | Rhizoid |
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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
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| 1. | Red algae | 2. | Green algae |
| 3. | Brown algae | 4. | Blue green algae |
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1. They are dependent on water for sexual reproduction.
2. Archegonium is flask shaped and produces multiple eggs.
3. Sporophyte is attached to the photosynthetic gametophytes and derives nourishment from it.
4. The antherozoids are released into water.
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Regarding Marchantia:
| I: | The thallus is dorsi-ventral and closely appressed to the substrate. |
| II: | The plant is monoecious. |
| 1. | Both I and II are incorrect |
| 2. | Only I is incorrect |
| 3. | Only I is correct |
| 4. | Both I and II are correct |
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