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Q. No.The class of pteridophytes to which Selaginella belongs is:
1. Psilopsida
2. Sphenopsida
3. Lycopsida
4. Pteropsida
Subtopic: Pteridophytes |
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Level 2: 60%+
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The giant redwood tree Sequoia, one of the tallest tree species, is a:
| 1. | Pteridophyte | 2. | Monocot angiosperm |
| 3. | Dicot angiosperm | 4. | Gymnosperm |
Subtopic: Gymnosperms |
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Level 1: 80%+
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The reduced male gametophyte in a gymnosperm is called a:
| 1. | pollen grain | 2. | microsporangium |
| 3. | microsporophyll | 4. | antheridium |
Subtopic: Gymnosperms |
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Level 2: 60%+
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Consider the two statements:
1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is correct; Statement II is correct
4. Statement I is incorrect; Statement II is correct
| Statement I: | The gymnosperms are plants in which the ovules are not enclosed by any ovary wall and remain exposed, both before and after fertilisation. |
| Statement II: | The seeds that develop post-fertilisation, are not covered, i.e., are naked. |
1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is correct; Statement II is correct
4. Statement I is incorrect; Statement II is correct
Subtopic: Gymnosperms |
90%
Level 1: 80%+
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The classification based on the premise that organisms belonging to the same taxa have a common ancestor is called as:
| 1. | Cytotaxonomy | 2. | Phylogenetic system |
| 3. | Chemotaxonomy | 4. | Numerical taxonomy |
Subtopic: Classification System: I | Classification System: II | Classification System |
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Level 1: 80%+
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The form and size of algae is highly variable. Which of the following is/are correct?
| I: | Ulothrix is a colonial alga. |
| II: | Volvox is a filamentous alga. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Algae | Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae: II | Chlorophyceae: Green Algae: III |
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Reproduction involving fusion between one large, non-motile (static) female gamete and a smaller, motile male gamete is termed:
1. Isogamous
2. Agamous
3. Anisogamous
4. Oogamous
1. Isogamous
2. Agamous
3. Anisogamous
4. Oogamous
Subtopic: Algae |
89%
Level 1: 80%+
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Green algae usually have a rigid cell wall made of:
| 1. | an inner layer of cellulose and an outer layer of pectose |
| 2. | an inner layer of pectose and an outer layer of cellulose |
| 3. | an inner layer of cellulose and an outer layer of lignin |
| 4. | an inner layer of cellulose and an outer layer of chitin |
Subtopic: Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae: II | Chlorophyceae: Green Algae: III |
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Level 1: 80%+
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Identify the incorrect statement:
| 1. | The gymnosperms are heterosporous. |
| 2. | Spores in gymnosperms are produced within sporangia. |
| 3. | Sporangia in gymnosperms are borne on sporophylls which are arranged spirally along an axis to form lax or compact strobili or cones. |
| 4. | Male strobili in gymnosperms are called macrosporangiate. |
Subtopic: Gymnosperms |
88%
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The leafy stage in the life cycle of a moss:
| 1. | develops from the primary protonema. |
| 2. | consists of upright, slender axes bearing spirally arranged leaves. |
| 3. | is attached to the soil through unicellular and unbranched rhizoids. |
| 4. | lacks the sex organs. |
Subtopic: Bryophytes | Bryophytes (Anthoceropsida) |
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Level 2: 60%+
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