| I: | Bacteria, as a group, show extensive metabolic diversity |
| II: | Only some bacteria are capable of biological nitrogen fixation |
| I: | 'Dikaryon' and 'Zygote' are synonymous |
| II: | 'Dikaryon' and 'Zygote' are diploid cells that produce gametes |
| I: | Fungi: Saprotrophs |
| II: | Lichens: Mutualism |
| III: | Malarial parasite in human RBC-commensal |
| I: | Bacteria reproduce sexually |
| II: | Transformation of a bacterial cell is sexual reproduction |
| I: | cause the water laden food to be steered into the gullet |
| II: | are not involved in movements as paramoecium is not motile |
| Statement I: | Ascospores are sexual spores and are produced endogenously. |
| Statement II: | Basidiospores are asexual spores and are produced exogenously. |
| Column-I | Column-II | ||
| A. | Archaebacteria | P. | Some can fix atmospheric nitrogen in heterocysts |
| B. | Cyanobacteria | Q. | Include important decomposers and are most abundant bacteria |
| C. | Mycoplasma | R. | Include extremophiles and methanogens |
| D. | Heterotrophic bacteria | S. | Lack a cell wall and can live without oxygen |
| A | B | C | D | |
| 1. | P | R | Q | S |
| 2. | R | P | Q | S |
| 3. | R | P | S | Q |
| 4. | P | R | S | Q |
| Assertion (A): | Archaea are often found in extreme environments like hot springs and salt pans due to their unique cell wall structure. |
| Reason (R): | The cell walls of Archaea contain peptidoglycan, which provides resistance to extreme conditions. |
| 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. |