Across
- 4. The variety of living things in a given area (habitat, ecosystem)
- 6. caused by difference in genes, which results in different characteristics
- 8. inherited characteristic that increases an organism's chance of survival
- 9. A type of drug resistance where a microorganism has developed the ability to survive exposure to an antibiotic
- 10. Preserved remains in animals
- 11. Evolution of one or more closely related species into different species
- 13. the theory that evolutionary traits can be explained by competition
- 14. the end of a species
- 15. Genetic drift that results from an event that drastically reduces the size of a population
- 16. a branching diagram showing the inferred evolutionary relationships among species
- 17. Genetic drift that occurs after a small number of individuals colonize a new area
- 20. a group of organisms have a common descendent
Down
- 1. the process of grouping things based on their similarities
- 2. The transfer of alleles of genes from one population to the other
- 3. the struggle between organisms to survive in a habitat with limited resources
- 5. Who proposed the idea of natural selection
- 7. a selective agent acts on a population and results in the same organism having more offspring
- 12. the gradual change in genetics (and traits) of a species over time
- 18. The gradual process by which something changes into a different form
- 19. consists of all genes, including all the different alleles, that are present in a population