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Q. No.All the following are examples of mosses except:
1.
Funaria
2.
Polytrichum
3.
Marchantia
4.
Sphagnum
Subtopic: Bryophytes (Liverworts) |
84%
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Pteridophytes:
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: | evolutionarily are the first terrestrial plants to possess vascular tissues – xylem and phloem. |
| II: | have gametophytes as the dominant generation in their life cycle. |
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: Pteridophytes |
82%
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In gymnosperms:
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: | the ovules are not enclosed by any ovary wall and remain exposed, both before and after fertilisation. |
| II: | the male and the female gametophytes do not have an independent free-living existence. |
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: Gymnosperms |
84%
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes:
| COLUMN I | COLUMN II | ||
| A | The gametes are flagellated and similar in size | P | Eudorina |
| B | The gametes are non-flagellated (non-motile) but similar in size | Q | Ulothrix |
| C | the female gametes are larger and flagellated, while the male gametes are smaller and flagellated | R | Fucus |
| D | one large, non-motile (static) female gamete and a smaller, motile male gamete |
S | Spirogyra |
| A | B | C | D | |
| 1. | S | Q | P | R |
| 2. | Q | S | P | R |
| 3. | Q | S | R | P |
| 4. | S | Q | R | P |
Subtopic: Algae |
72%
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Agar, a complex polysaccharide with various applications in microbiology and food industry, is commercially derived from:
| 1. | Red algae | 2. | Brown algae |
| 3. | Green algae | 4. | Diatoms |
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
81%
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The given figure shows:
1. Only I is correct
2. Only II is correct
3. Only II and III are correct
4. I, II and III are incorrect
| I: | The male gametophyte of Marchantia |
| II: | Hair like multicellular, branched true roots on the margins of the plant body. |
| III: | Sexual reproductive cup like structures on the dorsal surface of the plant. |
2. Only II is correct
3. Only II and III are correct
4. I, II and III are incorrect
Subtopic: Bryophytes |
54%
From NCERT
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Artificial systems of classification give equal weightage to vegetative and sexual characteristics which is not acceptable because:
| 1. | Sexual characters are not genetically determined |
| 2. | Vegetative characters are more easily affected by environment |
| 3. | Sexual characters are not easily observable in living beings |
| 4. | Vegetative reproduction is equally common as sexual reproduction |
Subtopic: Classification System |
88%
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Which of the following will not be applicable to the gymnosperm Pinus?
| 1. | Coralloid roots |
| 2. | Mycorrhizal association |
| 3. | Male and female cones or strobili are borne on the same tree |
| 4. | Branched stems |
Subtopic: Examples of Gymnosperms |
79%
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Algal cell walls are made up of:
| 1. | Cellulose, Galactans, Mannans and Minerals |
| 2. | Cellulose, Hemicellulose, Pectins and Proteins |
| 3. | Cellulose, Pectins, Mannans and Minerals |
| 4. | Cellulose, Hemicellulose, Mannans and Pectins |
Subtopic: Algae |
63%
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| Assertion (A): | Red algae are often found in deep waters. |
| Reason (R): | They have unique pigments that enable adaptations to low light conditions |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
87%
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