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| Question | Answer |
| Overproduction | More offspring produced than will ultimately survive and reproduce. |
| 2. Variation | Inheritable features vary from individual to individual. |
| 3. Change in environment | Changes in climate, topography, food supply, predators, etc. |
| 4. "Survival for existence" | Mainly competition within the species, for food, habitat, survival from being eaten. |
| 5. "Survival of the fit" (not necessarily the strongest) | Those with more adaptive traits tend to survive longer and/or produce the most offspring; these are the naturally selected |
| 6. Inheritance of "selected" features | Traits involved are already inheritable, but may involve new combinations. |
| 7. New species, better adapted to the new environment | When the collective traits of the environment differ significantly from the earlier population, and can no longer reproduce with the earlier population. |
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