Environmental Science Lesson 9

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Across
  1. 1. A trait that increases an organism's chance for survival
  2. 4. Passenger Pigeon, Carolina Parakeet, Dodo Bird, Dinosaurs
  3. 7. When two species use the same resource to survive and must split the resource
  4. 8. The process of "choosing" which animal is most fit to survive
  5. 9. When two species evolve because of changes in one another
  6. 10. Short for genetic
  7. 12. Being able to survive even with changing factors
  8. 13. The measure of how well an organism can survive
Down
  1. 2. Opposite of natural selection; when humans choose themselves whose genes will pass on
  2. 3. The name for one species splitting into two
  3. 5. A species getting separated, making the two gene pools different
  4. 6. A change in genetics that makes an organism different
  5. 11. Change over time