Evolution and Natural Selection

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Across
  1. 2. offspring produced by one parent
  2. 3. process of changing to adapt
  3. 5. asexual reproduction of the body into two new bodies
  4. 6. differences in organisms
  5. 7. random change in gene variant
  6. 10. complete disappearance of a species
  7. 12. a response to a stimulus in order to survive
  8. 15. physical changes in order to adapt to an environment
  9. 17. a cell that has a nucleus
  10. 19. similar features in organisms with same functions, but not from the same ancestors
Down
  1. 1. similar structures evolved from the same ancestor
  2. 4. arise by mutation
  3. 5. single-cell organisms possessing a prokaryotic
  4. 8. occurs when species evolve together
  5. 9. can only reproduce in a host
  6. 11. smaller cells without a nucleus
  7. 13. a trait that helps an organism survive in its environment
  8. 14. germs build immunity to treatment
  9. 16. is when a group separates from a larger group and develops its own characteristics
  10. 18. interbreeding from one species to another