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Q. No.Gonyaulax is:
1.
a heterotrophic bacteria pathogenic to cereal crops
2.
a dinoflagellate responsible for red tides
3.
a free living nematode
4.
a thermophilic archaebacterium
Subtopic: Kingdom Protista: Dinoflagellates |
96%
From NCERT
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That viruses could be crystallised and crystals consist largely of proteins was shown by:
1. M. W. Beijerinck
2. W. M. Stanley
3. Dmitri Ivanovsky
4. Louis Pasteur
Subtopic: Virus, Viroids & Prions |
88%
From NCERT
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All the following given differences between fungi belonging to Phycomycetes and Basidiomycetes are correct except:
| Phycomycetes | Basidiomycetes | ||
| 1. | Mycelium | Branched and septate | Aseptate and coenocytic |
| 2. | Asexual spores | Zoospores or aplanospores | Generally not found |
| 3. | Notable examples | Bread mould and Albugo | Rust and Smut fungi |
| 4. | Dikaryon stage |
Not seen | Present |
Subtopic: Kingdom Fungi: Basidomycetes | Kingdom Fungi: Phycomycetes |
81%
From NCERT
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The correct chronological sequence [beginning from the earliest] with respect to fungal sexual cycle will be:
1. Karyogamy, Plasmogamy and Meiosis
2. Meiosis, Plasmogamy and Karyogamy
3. Plasmogamy, Karyogamy and Meiosis
4. Meiosis, Karyogamy and Plasmogamy
Subtopic: Kingdom Fungi: Sexual Reproduction in Fungi |
85%
From NCERT
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In the given diagram showing filamentous Nostoc, the structure marked as A:
| 1. | is a resting spore |
| 2. | is involved in nitrogen fixation |
| 3. | is gas vacuole |
| 4. | is where carbon dioxide concentration mechanism is applied |
Subtopic: Kingdom Monera: Bacterial Classification |
95%
From NCERT
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Consider the two given statements:
1. Statement I is correct; Statement II is incorrect
2. Statement I is correct; Statement II is correct
3. Statement I is incorrect; Statement II is incorrect
4. Statement I is incorrect; Statement II is correct
| Statement I: | Association between mycobiont and phycobiont is found in Lichens. |
| Statement II: | An association between roots of higher plants and fungi is called mycorrhiza. |
2. Statement I is correct; Statement II is correct
3. Statement I is incorrect; Statement II is incorrect
4. Statement I is incorrect; Statement II is correct
Subtopic: Mycorrhiza | Lichens |
91%
From NCERT
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A unicellular organism shows:
This organism must be classified under:
| I: | Eukaryotic cell type |
| II: | Absent cell wall |
| III: | Capability to act as a heterotroph when deprived of sunlight |
| 1. | Kingdom Monera, as a mycoplasma |
| 2. | Kingdom Protista, as a euglenoid |
| 3. | Kingdom Protista, as a dinoflagellate |
| 4. | Kingdom Animalia, as a sponge |
Subtopic: Kingdom Protista: Euglenoids |
91%
From NCERT
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After karyogamy followed by meiosis, spores are produced endogenously in:
1. Neurospora
2. Alternaria
3. Agaricus
4. Colletotrichum
1. Neurospora
2. Alternaria
3. Agaricus
4. Colletotrichum
Subtopic: Kingdom Fungi: Introduction | Kingdom Fungi: Ascomycetes |
70%
From NCERT
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Given below are two statements:
| Assertion (A): | The two kingdom classification used for a long time was found inadequate |
| Reason (R): | A large number of organisms did not fall into either category of plants or animals in two kingdom classification of Linnaeus |
| 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. | Both (A) and (R) are false. |
Subtopic: Different Classification Systems |
88%
From NCERT
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Given below are two statements:
| Assertion (A): | The cell walls of diatoms are indestructible |
| Reason (R): | In diatoms, cell walls are embedded with silica |
| 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. | Both (A) and (R) are false. |
Subtopic: Kingdom Protista: Chrysophytes |
78%
From NCERT
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