Across
- 1. found only in one location
- 4. a change in a gene
- 6. a group of organisms of the same species
- 7. the genes that make up an organism's 'instruction book'
- 9. the evolution of new species
Down
- 2. survival of the fittest
- 3. a change in a population of organisms over time
- 5. naturally occurring
- 7. the molecules of DNA that code the instructions for an organism
- 8. the separation of one population from another