evolution crossword puzzle

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Across
  1. 2. occurs when a group within a species separates from other members of its species and develops its own unique characteristics
  2. 3. physical, behavioral, and biochemical characteristics
  3. 6. came up with the idea of evolution
  4. 9. process by which humans control the breeding of organisms in order to exhibit or eliminate a particular characteristic
  5. 10. the selection by humans for breeding of useful traits from the natural variation among different organisms
  6. 14. Preserved remains or evidence of an ancient organism
  7. 15. the study of the formation and development of an embryo and fetus
  8. 17. occurs when individuals with traits on one side of the mean in their population survive better or reproduce more than those on the other
  9. 18. Principle that living things were derived from common ancestors
  10. 20. Process by which individuals that are better suited to their environment survive and reproduce most successfully
  11. 21. the ancestor of two or more species in the later period
  12. 22. Structures that have different mature forms but develop from the same embryonic tissues
  13. 23. a person or animal that is descended from a specific
  14. 24. any inherited characteristic that increases an organism's chance of survival
  15. 25. the change in frequency of an existing gene variant in the population due to random chance
Down
  1. 1. a phenomena that occurs when a small group of individuals becomes isolated from a larger population
  2. 4. A well-tested explanation that unifies a broad range of observations
  3. 5. The ability of an individual to survive and reproduce in its specific environment
  4. 7. the scientific study of genes and heredity
  5. 8. individuals near the center of the curve have higher fitness than individuals at either end of the curve
  6. 11. Change in species over time.
  7. 12. Serves no useful function in an organism but shows a link to a common ancestor
  8. 13. biological process by which new individual organisms,offspring, are produced from their parents (to produce more)
  9. 16. One of two or more versions of a genetic sequence at a particular region on a chromosome
  10. 19. Principle that species descended with changes from other species