Evolution by Natural Selection

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Across
  1. 6. a group of animals that live and reproduce together
  2. 9. process by which animals best adapted to an environment are more likely to survive
  3. 10. bird who's beaks are a common example of natural selection
  4. 11. the peppered _______ adapted to living in trees covered in pollution
  5. 13. black fur appeared in the mouse population because of a ________________
  6. 14. when an animal cannot survive environmental change and the whole population dies out
  7. 15. when an ostrilope population has ALL possible fur colors, it has high ____________
Down
  1. 1. when an animal blends into the background to hide from predators
  2. 2. bone evidence of life from the past
  3. 3. whale ancestor that surprisingly had leg bones
  4. 4. rock _________ mouse adapted to living on lava rock
  5. 5. graph that shows distribution of traits in a population
  6. 7. naturalist who described the process of Natural Selection in the 1800's
  7. 8. an unexpected ____ bone was found in the back of a wolf-like skull
  8. 9. poisonous amphibian of the forests of oregon that became more poisonous in the last 50 years
  9. 12. first four-limbed animal to come out of water