Across
- 1. inherited characteristics of an animal due to nature
- 4. inherited characteristics that help animals survive
- 7. selective breeding for a certain type of animal
- 8. each animal of its species competes with each other for basic living necessities
- 9. Organisms used to look different than they do now because of natural selection
Down
- 2. the animal that is most fit for the environment will live
- 3. the ability for one to survive and reproduce in its environment
- 5. differences between individuals in a species
- 6. the thought that all living things came from one big ancestor