Evolution and Natural Selection

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Across
  1. 4. A fertilized egg
  2. 10. Change over time
  3. 13. Form of dating fossils that it most accurate
  4. 14. Immunity that your own body produces
  5. 15. Can be dominant or recessive
  6. 16. The slow evolution of species
  7. 17. Asexual Reproduction
  8. 18. Structures that have the same origin but have different functions
  9. 19. One of the two animals Darwin studied on the Galapagos islands
  10. 20. Immunity that is given to your body
  11. 21. Hypothesized about the early atmosphere
Down
  1. 1. Evoloved from prokaryotes
  2. 2. Well known example of natural selection (we did a simulation on it; add hyphen)
  3. 3. Structures that no longer serve a purpose
  4. 5. Power-house of the cell
  5. 6. Percent of total species that are extinct (add hyphen)
  6. 7. The islands that Charles Darwin studied
  7. 8. First cells on earth
  8. 9. The principle that events in the past occurred suddenly and were caused by different mechanisms
  9. 11. Structures that share the same function but have a different evolutionary origin
  10. 12. The study of embryos and their development
  11. 15. Means "against life"