- 1(current)
Q. No.Read the following statements with respect to red algae:
How many of the above statements are incorrect?
1. One
2. Three
3. Four
4. Five
| (i) | Majority of the red algae are marine, mostly found in warmer sea |
| (ii) | They occur in both well lighted regions close to the surface of water and also at great depths in ocean where relatively less light penetrates |
| (iii) | These lack chlorophyll-d |
| (iv) | These are mostly unicellular |
| (v) | These lack vegetative propagation |
1. One
2. Three
3. Four
4. Five
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
81%
Level 1: 80%+
Hints
Read the following statements with respect to brown algae:
(i) Sexual reproduction may be isogamous, anisogamous or oogamous
(ii) The gametes are always without flagella
(iii) Gracilaria belongs to brown algae
(iv) Common forms are Ectocarpus, Dictyota, Laminaria, Sargassum, and Fucus
(v) The gametes are pyriform (pear-shaped) and bear two laterally attached flagella
How many of the above statements are correct?
1. Two
2. Three
3. One
4. Five
(i) Sexual reproduction may be isogamous, anisogamous or oogamous
(ii) The gametes are always without flagella
(iii) Gracilaria belongs to brown algae
(iv) Common forms are Ectocarpus, Dictyota, Laminaria, Sargassum, and Fucus
(v) The gametes are pyriform (pear-shaped) and bear two laterally attached flagella
How many of the above statements are correct?
1. Two
2. Three
3. One
4. Five
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
87%
Level 1: 80%+
Hints
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Study the diagram given below, and find out how many of the statements given below is related to this diagram.
| I. | It is source of food. |
| II. | Its wall has poly sulphated esters. |
| III. | Its reserve food is similar to glycogen in structure. |
| IV. | There is no motile stage in its life – cycle. |
1. 1
2. 2
3. 3
4. 4
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
65%
Level 2: 60%+
Hints
| Assertion(A): | The members of Rhodophyceae are commonly called red algae. |
| Reason(R): | Red algae have the predominance of the red pigment, r-phycocyanin in their body. |
Choices for Assertions and reasons:
| 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. | (A) is false, but (R) is true. |
Subtopic: Rhodophyceae: Red Algae and Importance of Algae |
Level 3: 35%-60%
Hints
- 1(current)
Q. No.
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