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Q. No.Regarding gymnosperms:
I:
Ovules are not enclosed by any ovary wall and remain exposed, both before and after fertilisation.
II:
The seeds that develop post-fertilisation, are not covered, i.e., are naked.
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 |
91%
From NCERT
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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 |
55%
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%
From NCERT
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The classification system given by Bentham and Hooker is a/an:
| 1. | Artificial system | 2. | Natural system |
| 3. | Phylogenetic system | 4. | Useless system |
Subtopic: Classification System |
84%
From NCERT
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Which of the following will not be applicable to the Gymnosperm Cycas?
1. Coralloid roots
2. Pinnate persistent leaves
3. Dioecy
4. Branched stems
1. Coralloid roots
2. Pinnate persistent leaves
3. Dioecy
4. Branched stems
Subtopic: Examples of Gymnosperms |
78%
From NCERT
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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%
From NCERT
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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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Identify the correct statements:
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | The gametes are flagellated and similar in size in Ulothrix or non-flagellated (non-motile) but similar in size in Spirogyra. |
| II: | Fusion of two gametes dissimilar in size, as in species of Eudorina is termed as anisogamous. |
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Algae |
82%
From NCERT
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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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| Assertion (A): | Bryophytes have not been very successful on land. |
| Reason (R): | The gametophyte is the dominant stage in the alternation of generation in Bryophytes. |
| 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: Bryophytes |
81%
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