Across
- 4. _____ selection results in the changes of inherited characteristics in a population
- 6. In the Galapagos, Darwin realized that this species was actually 3 different species
- 7. _____ selection is when humans breed certain animals because they have beneficial variations
- 8. The idea that all living organisms are related and they all have a _____ ancestor
Down
- 1. Darwin called this the ability of an individual to survive and reproduce in a specific environment
- 2. _____ of the fittest is when animals with higher levels of fitness are able to survive and reproduce more successfully
- 3. natural ____ is the differences among individuals of a species
- 5. descent with _____ was used by Darwin to explain why species today look different from their ancestors