Across
- 5. best suited individuals will ________ and reach reproductive age.
- 6. selection that causes species to change over time.
- 8. bird observed by Darwin in the Galapagos
- 9. all organisms have variations that are...
Down
- 1. struggle for resources
- 2. all species share a common
- 3. survival of the __________________.
- 4. organisms produce more than can survive
- 7. type of selection that breeds for specific traits