Across
- 1. organisms with similar enough genes to be able to produce fertile offspring.
- 5. The process whereby organisms better adapted to their environment tend to survive and produce more offspring.
- 7. Remains of an organism preserved in rock formations.
- 8. Change or error in DNA.
Down
- 2. Developed the theory of evolution.
- 3. Organisms that no longer exist.
- 4. Pattern of nucleotides that encode for an organism.
- 6. Theory of how new species develop.