- 1(current)
Q. No.Read the following statements with respect to diatoms:
How many of the above statements is/are incorrect?
1. One
2. Four
3. Three
4. Two
| I: | In diatoms, the cell walls form two thin overlapping shells which fit together as in a soap box |
| II: | The walls are embedded with silica and thus are indestructible |
| III: | The fossilized diatoms are called diatomaceous earth |
| IV: | Diatoms are not the main producers in the oceans |
| V: | Diatomaceous earth is used in polishing, filtration of oil and syrups |
1. One
2. Four
3. Three
4. Two
Subtopic: Â Kingdom Protista: Chrysophytes |
 73%
Level 2: 60%+
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Read the following statements:
i. Majority of the slime moulds are freshwater organisms
ii. Dinoflagellates are mostly freshwater organisms
iii. Slime moulds form plasmodium
iv. Protozoans may be autotrophs
v. The spores of the slime moulds are dispersed by water current
How many of the above statements are incorrect?
1. Three
2. Two
3. Four
4. Five
i. Majority of the slime moulds are freshwater organisms
ii. Dinoflagellates are mostly freshwater organisms
iii. Slime moulds form plasmodium
iv. Protozoans may be autotrophs
v. The spores of the slime moulds are dispersed by water current
How many of the above statements are incorrect?
1. Three
2. Two
3. Four
4. Five
Subtopic: Â Kingdom Protista: Chrysophytes |Â Kingdom Protista: Dinoflagellates |
Level 3: 35%-60%
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Match the columns:
1. A = (iv) , B = (ii) , C = (iii), D = (i)
2. A = (i) , B = (iv) , C = (iii), D = (ii)
3. A = (i) , B = (ii) , C = (iii), D = (iv)
4. A = (iv) , B = (iii) , C = (i), D = (ii)
| Column -I | Column-II |
| A. Plasmodium | (i) Diatoms |
| B. Mixotrophic nutrition | (ii) Euglenoids |
| C. Red tide | (iii) Dinoflagellates |
| D. Oceanic chief producers | (iv) Slime moulds |
1. A = (iv) , B = (ii) , C = (iii), D = (i)
2. A = (i) , B = (iv) , C = (iii), D = (ii)
3. A = (i) , B = (ii) , C = (iii), D = (iv)
4. A = (iv) , B = (iii) , C = (i), D = (ii)
Subtopic: Â Kingdom Protista: Chrysophytes |Â Kingdom Protista: Euglenoids |Â Kingdom Protista: Slime Moulds |
 93%
Level 1: 80%+
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| Assertion (A): | The spores of 'consumer-decomposer' protists contain cellulosic cell wall. |
| Reason (R): | These spores are dispersed by wind. |
| 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: Â Kingdom Protista: Chrysophytes |
 66%
Level 2: 60%+
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Assertion: Cell wall of diatoms are indestructible
Reason: Cell wall of diatoms possesss silica
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true and the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statement
Reason: Cell wall of diatoms possesss silica
1. If both assertion and reason are true and the reason is the correct explanation of the assertion
2. If both assertion and reason are true and the reason is not the correct explanation of the assertion
3. If assertion is true but reason is false
4. If both assertion and reason are false statement
Subtopic: Â Kingdom Protista: Chrysophytes |
 95%
Level 1: 80%+
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