Evolution Crossword

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Across
  1. 3. Darwin's second law of evolution.
  2. 7. the total amount of genes in a population.
  3. 9. when a physical body separates two populations.
Down
  1. 1. the selection of mates because of similar traits.
  2. 2. when change happens in a few thousand rather than a few million years.
  3. 4. the change of a species over time.
  4. 5. when genes move from population to population through migration.
  5. 6. when old genes leave a population.
  6. 8. the internal and external appearance of an animal.
  7. 9. when species evolve very slowly over millions of years.
  8. 10. when new genes come into a population.
  9. 11. the process of one species turning into two.