Q. No.All the following statements will be true for brown algae except:
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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I. Liverworts
II. Mosses
| 1. Only I | 2. Only II |
| 3. Both I and II | 4. Neither I nor II |
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I. Protonema is a gametophyte stage that is creeping, green, branched and frequently filamentous.
II. Leafy stage bears sex organs and is attached to the soil through multicellular and branched rhizoids.
III. Sex organs are produced at the apex of the leafy shoot.
IV. They have an elaborate mechanism of spore dispersal.
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Heterospory in some pteridophytes paved the way for the evolution of seeds in higher plants. |
| Reason (R): | The megaspores and microspores in heterosporous ferns give rise to female and male gametophytes respectively. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
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I. The dicots are characterized by seeds having two cotyledons, reticulate venation and trimerous flowers.
II. The monocots are characterized by single cotyledonous seed, parallel venation and tetramerous or pentamerous flowers.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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