Q. No.As a group the most extensive metabolic diversity is shown by:
1.
Bacteria
2.
Protista
3.
Fungi
4.
Animals
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Halophiles are archaebacteria adapted to extreme:
| 1. | Hot habitats | 2. | Saline habitats |
| 3. | Marshy habitats | 4. | Cold habitats |
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Methanogens are commonly present in:
1. Alimentary canal of the lower invertebrates
2. Symbiotic relationships with xerophytic plants
3. Gut of ruminant animals
4. Close associations with corals
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Consider the following regarding the reasons for the fact that now Cyanobacteria are kept in Monera and not in Plantae:
I. They are prokaryotes.
II. The cell wall of cyanobacteria has peptidoglycan.
III. They can fix atmospheric nitrogen.
The correct explanations would be:
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
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Identify the incorrect statement regarding cyanobacteria:
1. They have chlorophyll a similar to green plants
2. Colonies surrounded by pellicle – a protein rich layer
3. Often form blooms in polluted water bodies
4. Fix nitrogen in specialized cells called hetrocysts
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Which of the following is not a feature of members of Kingdom Fungi?
1. Eukaryotic cell type
2. Chitinous cell wall
3. Organ system body organization
4. Heterotrophic mode of nutrition
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The terms ‘bracket fungi’ or ‘pufballs’ is used for some of the members of the class:
1. Phycomycetes
2. Ascomycetes
3. Basidiomycetes
4. Deuteromycetes
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Chemosynthestic autotrophic bacteria:
| I. | Produce ATP by oxidizing inorganic substances |
| II. | Play a great role in recycling nutrients like nitrogen, phosphorus, iron and sulfur |
| 1. | Both I and II are correct | 2. | Only I is correct |
| 3. | Only II is correct | 4. | Both I and II are incorrect |
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Identify the incorrect statement regarding true bacteria?
| 1. | As a group, they exhibit maximum metabolic diversity. |
| 2. | Chemosynthetic autotrophic bacteria play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur. |
| 3. | Heterotrophic bacteria are the most abundant in nature. |
| 4. | Bacteria reproduce mainly by fission but sometimes under favourable conditions, they produce spores. |
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In Whittaker’s Five Kingdom classification, heterotrophic mode of nutrition is present in members of:
| 1. | Two kingdoms | 2. | Three kingdoms |
| 3. | Four kingdoms | 4. | Five kingdoms |
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