Unit 4 Evolution

5. The variety of living things in an area.
6. How well an organism survives and reproduces.
7. The growth of cities as people move from rural areas.
12. A version of a gene that can cause different traits.
13. Changes in a population of organisms over time.
14. When organisms with helpful traits survive and pass those traits to their offspring.
15. Adaptation Physical or chemical changes in an organism that help it survive.

1. A well-tested explanation based on evidence.
2. a group of organisms that can interbreed with each other in nature and produce fertile offspring
3. The ability to recover after a disturbance.
4. Related to cities or towns.
8. A trait that helps an organism survive and reproduce.
9. A characteristic of an organism, like eye color or height.
10. a group of organisms of the same species that live in a specific geographic area and are capable of interbreeding with each other
11. Adaptation Changes in behavior that help an organism survive.