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Q. No.
Assertion (A):
Diatoms are the chief ‘producers’ in the oceans.
Reason (R):
Diatoms are one of the most abundant and diverse groups of
photosynthetic phytoplankton in the oceans.
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
photosynthetic phytoplankton in the oceans.
Subtopic: Kingdom Protista: Chrysophytes |
72%
From NCERT
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Which group of organisms are characterised by a naked cytoplasm, multinucleated plasmodium and saprophytic nutrition?
| 1. | Monera | 2. | Chrysophytes |
| 3. | Fungi | 4. | Slime molds |
Subtopic: Kingdom Protista: Slime Moulds |
81%
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In 1969, who proposed the five kingdom classification for living organisms?
| 1. | R.H. Whittaker | 2. | C.Linnaeus |
| 3. | A. Roxberg | 4. | Virchow |
Subtopic: Different Classification Systems |
97%
From NCERT
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How many of the given statements are correct regarding euglenoids:
1. 1
2. 2
3. 3
4. 4
| I: | The majority of them are freshwater organisms found in stagnant water. |
| II: | Instead of a cell wall, they have a protein rich layer called pellicle which makes their body flexible. |
| III: | They have more than two flagella, on all sides of their body. |
| IV: | The pigments of euglenoids are identical to those present in higher plants. |
2. 2
3. 3
4. 4
Subtopic: Kingdom Protista: Euglenoids |
84%
From NCERT
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A unicellular and eukaryotic organisms belongs to Kingdom:
| 1. | Monera | 2. | Protista |
| 3. | Fungi | 4. | Archaea |
Subtopic: Kingdom Protista: Introduction |
92%
From NCERT
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What would be true regarding the comparison of a virus and a viroid?
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | Protein coat is absent in a viroid but is present in a virus |
| II: | Low molecular weight RNA is present in a virus but is absent in a viroid |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Virus, Viroids & Prions |
87%
From NCERT
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Nostoc:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | is a cyanobacterium. |
| II: | is photosynthetic autotroph. |
| III: | is capable of fixing atmospheric nitrogen. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Kingdom Monera: Bacterial Classification |
82%
From NCERT
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How many of the given statements will be true for the members of the class ascomycetes of fungi?
1. Two
2. Three
3. Four
4. Five
| (i) | These are commonly called sac fungi |
| (ii) | These are mostly multicellular |
| (iii) | They are saprotrophic, decomposers, parasitic or coprophilous |
| (iv) | Their mycelium is aseptate |
| (v) | Conidia produced by them are endogenous |
2. Three
3. Four
4. Five
Subtopic: Kingdom Fungi: Ascomycetes |
65%
From NCERT
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Identify the statements which will be incorrect regarding viruses:
1. Only I, II and III
2. Only I, II and IV
3. Only II, III and IV
4. I, II, III and IV
| I: | Viruses possess their own metabolic system |
| II: | All viruses contain RNA and DNA |
| III: | Viruses are obligate parasites |
| IV: | Nucleic acid of virus is known as capsid |
2. Only I, II and IV
3. Only II, III and IV
4. I, II, III and IV
Subtopic: Virus, Viroids & Prions |
72%
From NCERT
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Identify the correct statements regarding diatoms:
1. Only I, II and III
2. Only I, II and IV
3. Only II, III and IV
4. I, II, III and IV
| I: | Diatoms are chief producers in the oceans |
| II: | Diatoms are microscopic and float passively in water |
| III: | The walls of diatoms are easily destructible |
| IV: | 'Diatomaceous earth' is formed by the cell walls of diatoms |
2. Only I, II and IV
3. Only II, III and IV
4. I, II, III and IV
Subtopic: Kingdom Protista: Chrysophytes |
84%
From NCERT
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