As a group the most extensive metabolic diversity is shown by:
1. | Bacteria | 2. | Protista |
3. | Fungi | 4. | Animals |
Statement I: | Archaebacteria can survive in extreme conditions. |
Statement II: | Methanogens are archaebacteria. |
1. | Statement I is correct; Statement II is correct |
2. | Statement I is incorrect; Statement II is correct |
3. | Statement I is correct; Statement II is incorrect |
4. | Statement I is incorrect; Statement II is incorrect |
Assertion(A): | The cyanobacteria that are also referred to as blue green algae are not ‘algae’ any more. |
Reason(R): | The cyanobacteria are photosynthetic autotrophs. |
1. | (A) is true and (R) is false. |
2. | Both (A) and (R) are true and (R) is a correct explanation of (A). |
3. | Both (A) and (R) are true but (R) is not a correct explanation of (A). |
4. | (A) is false and (R) is true. |
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 |
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. |