Evolution and Natural Selection

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Across
  1. 4. ____ ancestry; fundamental principle of modern evolutionary theory
  2. 5. portions of a DNA molecule which code for proteins
  3. 8. ____ selection; controlling the breeding of organisms to obtain the desired results in the offspring
  4. 11. ____ trait; a feature no longer having any apparent function
  5. 13. ____ selection; the driving force of evolution
  6. 14. evolution as a result of genetic changes that give rise to new species
  7. 16. any change in a characteristic which increases the ability of an organism to survive and reproduce
  8. 18. group of organisms of the same species living and reproducing in the same place at the same time
  9. 19. a hypothesis that has been tested extensively over time and explains a broad range of scientific data with high reliability
Down
  1. 1. modern ____; the union of genetics with evolutionary theory
  2. 2. remnants of organisms or structures found within rocks and layers of sediments
  3. 3. the change of an organism over time
  4. 4. organizing organisms into groups based upon their similarities
  5. 6. carbon 14 is an example of a radioactive ____; an atom of an element with a different number of neutrons; used to date fossils
  6. 7. the differences among individuals of the same species living in the same place at the same time
  7. 9. ____ tree diagram; often used to show relationships between modern organisms and their ancestors
  8. 10. evolution applying to whole groups of species often due to changing environments or major historical events
  9. 12. the distribution of organisms around the world
  10. 15. a change in the genetic code of an organism
  11. 17. the amount of time that it takes for 1/2 of a radioactive substance to become nonradioactive