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Evolution Crossword Puzzle 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Across Down 3. A Scottish scientist who recognized that the history of the Earth could be determined by understanding how processes such as erosion and sedimentation work in the present day 5. A heritable change in the characteristics within a population from one generation to the next; the development of new types of organisms from preexisting types of organisms over time 6. A structure in an organism that is reduced in size and function and that may have been complete and functional in the organism's ancestors 9. A scientist who discovered organisms are not passively altered by their environment. Instead, a change in the environment causes changes in the needs of organisms living in that environment, which in turn causes changes in their behavior 11. In evolutionary theory, a measure of an individual's hereditary contribution to the next generation 14. The inability of members of a population to successfully interbreed with members of another population of the same or related species 1. An anatomical structure in one species that is similar in function and appearance, but not in evolutionary origin, to another anatomical structure is another species 2. An evolutionary pattern in which many species evolve from a single ancestral species 4. Anatomical structures in one species that, compared compared to other anatomical structures in another species, originated from a single anatomical structure in a common ancestor of two species 7. The process by which individuals that are better adapted to their environment survive and reproduce more successfully than less less adapted individuals do; a theory to explain the mechanism of evolution 8. The process of becoming adapted to an environment; an anatomical, physiological, or behavioral trait that improves an organism's ability to survive and reproduce 10. The random change in allele frequency in a population 12. The physical separation of populations due to geographic barriers that prevents interbreeding 16. The selective breeding of organisms (by humans) for specific desirable characteristics 20. A researcher who believed that the growth of a population will always outrun its ability to feed itself, so eventually, there will not be enough food to feed the population 13. The process by which unrelated species become more similar as they adapt to the same kind on environment 15. A defense in which one organism resembles another that is dangerous or poisonous 17. The trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock 18. An English naturalist who proposed the theory of natural selection by studying animals on the Galapagos Islands; he discovered the term "survival of the fittest" 19. The ability of an organism to change and blend in with its surrounding environment