| Assertion (A): | As per Darwin, over many generations, survivors will leave more progenies. |
| Reason (R): | Survivors have variations that make resource utilization better for them. |
| 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. |
| 1. | adaptive radiation |
| 2. | seasonal migration |
| 3. | brood parasitism |
| 4. | connecting links |
According to A mutation was gradual while de Vries believed mutation caused B and hence called it C
| A | B | C | |
| 1. | Lamarck | Saltation | Speciation |
| 2. | Thomas Malthus | Speciation | Natural selection |
| 3. | Darwin | Speciation | Saltation |
| 4. | Wallance | Natural selection | Speciation |