| List-I | List-II | ||
| A. | Mesozoic Era | I. | Lower invertebrates |
| B. | Proterozoic Era | II. | Fish & Amphibia |
| C. | Cenozoic Era | III. | Birds & Reptiles |
| D. | Paleozoic Era | IV. | Mammals |
| 1. | Dominance |
| 2. | Whether it is autosomal linked or sex linked |
| 3. | Forces such as natural selection |
| 4. | The number of alleles present for a particular gene |
| Assertion (A): | Variations on which natural selection acts, arise as a result of random mutations. |
| Reason (R): | A new variation may, or may not, be adaptive. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | Both (A) and (R) are True and (R) correctly explains (A). |
| 3. | (A) is False and (R) is also False. |
| 4. | (A) is True but (R) is False. |
| Assertion (A): | The hemoglobin gene is less similar between humans and gorilla than between humans and chimpanzees. |
| Reason (R): | Humans and chimpanzees have a more recent common ancestor than human and gorilla. |
| 1. | Both (A) and (R) are True but the (R) does not correctly explain (A). |
| 2. | Both (A) and (R) are True and the (R) correctly explains (A). |
| 3. | (A) is False and (R) is also False. |
| 4. | (A) is True but (R) is False. |