Across
- 4. artificial selection as practiced by farmers is also called
- 5. changes in species over time
- 8. average is best
- 12. joint published with Darwin
- 14. French naturalist who proposed that evolution was the refinement of traits that equip organisms to be successful
- 15. group of similar organisms that can breed and produce fertile offspring
- 16. the geographic distribution of species
- 18. one who comes down from a common ancestor
- 19. a group of organisms of the same species populating a given area
- 21. a measure of how well an organism can survive and reproduce in its environment
- 23. inherited characteristic that increases chances of survival
- 24. a well-tested explanation that unifies a broad range of observation
Down
- 1. the variety of alleles and traits in a population
- 2. natural selection on single-gene traits can lead to changes in
- 3. tailbone of a human
- 6. both extremes are best but average is bad
- 7. preserved remains or evidence of an ancient organism
- 9. individuals that are better suited to their environment survive and reproduce most successfully
- 10. location where Darwin spent time studying variations
- 11. an ancestral species from which later species evolved
- 13. credited with the theory of evolution
- 17. Darwin viewed the fossil record as
- 18. one extreme is the best
- 20. the comparison of body structures in different species
- 22. colonization of a new habitat by a small group of individuals