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Q. No.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) |
77%
From NCERT
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The pattern where a dominant, independent, photosynthetic, thalloid or erect phase is represented by a haploid gametophyte and it alternates with the short-lived multicellular sporophyte totally or partially dependent on the gametophyte for its anchorage and nutrition is seen in:
1. Pteridophytes
2. Bryophytes
3. Gymnosperms
4. Angiosperms
1. Pteridophytes
2. Bryophytes
3. Gymnosperms
4. Angiosperms
83%
From NCERT
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The correct statements regarding the life cycle seen in various algae will be:
1. Only I
2. Only III
3. Only I and III
4. I, II and III
| I. | Most algal genera are haplontic |
| II. | Genera such as Ectocarpus, Polysiphonia, and kelps are diplontic |
| III. | Fucus is diplontic |
2. Only III
3. Only I and III
4. I, II and III
78%
From NCERT
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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%
From NCERT
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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 |
90%
From NCERT
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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%
From NCERT
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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 |
89%
From NCERT
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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
1. Cytotaxonomy
2. Phylogenetic system
3. Chemotaxonomy
4. Numerical taxonomy
Subtopic: Classification System: I | Classification System: II | Classification System |
95%
From NCERT
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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%
From NCERT
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The reduced male gametophyte in a gymnosperm is called a:
1. pollen grain
2. microsporangium
3. microsporophyll
4. antheridium
1. pollen grain
2. microsporangium
3. microsporophyll
4. antheridium
Subtopic: Gymnosperms |
74%
From NCERT
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