Across
- 1. A class of individuals having some common characteristics
- 5. An inherited characteristic that improves an organisms ability to survive in a particular environment
- 6. All of the changes that have transformed life over a period of time
- 7. Darwin noticed a variation between ___________ on the Galapagos islands
- 8. Charles __________ developed the theory of natural selection
- 9. Variations within a species is caused by a ____________
- 10. If natural selection does not occur it will often result in a species becoming _________
Down
- 2. A group of organisms of the same species living in a particular area at the same time
- 3. Favorable ___________ are passed onto the offspring of a species resulting in evolution
- 4. _________ occurs between individuals within a species