Across
- 2. Preserved remains found in the ground
- 3. Change over time
- 5. Evolutionary change occurs through incremental small changes within populations
- 7. When two species evolve together
- 8. A characteristic that helps an organism survive
- 10. An individual animal, plant, or single-celled life form
- 12. Organisms who are descended from one, or several
Down
- 1. Proposed the theory of evolution by natural selection
- 2. Natural selection is also known as the survival of the_
- 3. When animals disappear from the earth
- 4. Evolutionary change occurs through variation between individuals
- 6. Selection by humans for desired traits
- 9. A particular characteristic of an individual plant or animal
- 11. The selection of traits based on their role in courtship and mating