Natural Selection

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Across
  1. 1. A class of individuals having some common characteristics
  2. 5. An inherited characteristic that improves an organisms ability to survive in a particular environment
  3. 6. All of the changes that have transformed life over a period of time
  4. 7. Darwin noticed a variation between ___________ on the Galapagos islands
  5. 8. Charles __________ developed the theory of natural selection
  6. 9. Variations within a species is caused by a ____________
  7. 10. If natural selection does not occur it will often result in a species becoming _________
Down
  1. 2. A group of organisms of the same species living in a particular area at the same time
  2. 3. Favorable ___________ are passed onto the offspring of a species resulting in evolution
  3. 4. _________ occurs between individuals within a species