Evolution Choice Board Crossword

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Across
  1. 3. A frog born with extra legs.
  2. 7. Thought that if the more you use a part of the body, the stronger and more developed it will become.
  3. 8. The idea that older species evolve into new species over time.
  4. 9. Indian elephants, blue jays, cardinals.
  5. 11. The set of information that controls a trait; a segment of DNA on a chromosome.
  6. 13. A technique used to determine which of two fossils is older based on the layer of rock in which it was found.
  7. 14. The process of selecting a few organisms with desired traits to serve as parents of the next generation.
  8. 15. One of the parts of Darwin's theory on evolution.
Down
  1. 1. The preserved remains or traces on an organism that lived in the past.
  2. 2. The last shared common ancestor on the branching tree of evolution.
  3. 4. Proposed the theory of evolution that is believed to be true today.
  4. 5. The millions of fossils that have been collected by scientists.
  5. 6. A well-tested concept that explains a wide range of observations.
  6. 10. Human appendix, human tailbone, pelvic bone of a snake, wings of a wingless bird.
  7. 12. Dinosaurs, dodo birds, passenger pigeons.