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