Evolution

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Across
  1. 2. diminished in size because of disuse
  2. 4. changes in species is slow and gradual, occurring in small periodic changes
  3. 5. evolution occurs in spurts of relatively rapid change with long periods of non-change
  4. 6. evolution of unrelated species because of similar environments
  5. 7. species evolving from a common ancestor
  6. 8. similar structures because of a common ancestor
  7. 9. similar structures, NOT because of common ancestors
  8. 10. idea that genes in a population change over time to best fit to their environment
Down
  1. 1. two species evolving complementary structures because of interaction
  2. 3. evolution of related species in different environments
  3. 6. naturalist, geologist and biologist, best known for his contributions to the science of evolution