Q. No.Algae are useful
1.
Because at least half of the total carbon dioxide fixation on Earth is carried out by algae through photosynthesis.
2.
Algae being photosynthetic can increase the level of dissolved oxygen in their immediate environment
3.
They are primary producers of energy rich compounds and form the basis of the food cycles of all aquatic animals
4.
All of the above
| 1. | Because at least half of the total carbon dioxide fixation on Earth is carried out by algae through photosynthesis. |
| 2. | Algae being photosynthetic can increase the level of dissolved oxygen in their immediate environment |
| 3. | They are primary producers of energy rich compounds and form the basis of the food cycles of all aquatic animals |
| 4. | All of the above |
Subtopic: Algae |
97%
Level 1: 80%+
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Hydrocolloid is
| 1. | Water soluble substance |
| 2. | Water holding substance |
| 3. | Hydrogen gas containing substance |
| 4. | Oxygen gas containing substance |
Subtopic: Algae |
96%
Level 1: 80%+
Hints
Algin
| 1. | Water holding substance |
| 2. | Obtained from brown algae |
| 3. | Non sulfated water holding substance |
| 4. | All of these |
Subtopic: Algae |
89%
Level 1: 80%+
Hints
Carrageen
| 1. | Water holding substance |
| 2. | Obtained from red algae |
| 3. | Sulfated water holding substance |
| 4. | All of these |
Subtopic: Algae |
94%
Level 1: 80%+
Hints
Subtopic: Algae |
90%
Level 1: 80%+
Hints
Subtopic: Algae |
94%
Level 1: 80%+
Hints
Pyrenoid is
| 1. | Storage bodies located in cytoplasm of chloropbyceae |
| 2. | Storage bodies located in cytoplasm of Phaeophyceae |
| 3. | Storage bodies located in chloroplast of chlorophyceae |
| 4. | Storage bodies located in chloroplast of Phaeophyceae |
Subtopic: Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae |
85%
Level 1: 80%+
Hints
Subtopic: Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae |
93%
Level 1: 80%+
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Vegetative reproduction in chlorophyceae takes place by
| 1. | Fragmentation+ spore formation |
| 2. | Only spore formation |
| 3. | Only Fragmentation |
| 4. | Isogamous |
Subtopic: Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae |
Level 4: Below 35%
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Asexual reproduction in chlorophyceae is by
| 1. | Zoospore formation in Antheriodiophore |
| 2. | Fragmentation |
| 3. | Zoospore formation in Zoosporangia |
| 4. | Both 1 and 2 |
Subtopic: Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae: II | Chlorophyceae: Green Algae |
58%
Level 3: 35%-60%
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