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Q. No.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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| Assertion (A): | Diatoms leave behind large amount of cell wall deposits in their habitat, which gets accumulated over billions of years |
| Reason (R): | -Silicious cell walls in diatoms are indestructible |
| 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 |
83%
From NCERT
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Given below are two statements:
| Assertion (A): | Infectious agent discovered by T.O. Diener, lack protein coat that is found in viruses |
| Reason (R): | Viroids have RNA of low molecular weight |
| 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: Virus, Viroids & Prions |
73%
From NCERT
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Given below are two statements:
| Assertion (A): | Deuteromycetes are commonly known as imperfect fungi |
| Reason (R): | Sexual reproduction is absent in the members of the deuteromycetes |
| 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 Fungi: Deuteromycetes |
From NCERT
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Given below are two statements:
| Assertion (A): | Viruses can pass through bacteria-proof filters |
| Reason (R): | Viruses could be crystallized and crystals consist largely of proteins |
| 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: Virus, Viroids & Prions |
82%
From NCERT
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