A2.1 Origins of Cells

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Across
  1. 9. membrane bound structure formed from fatty acids
  2. 11. capable of maintaining internal conditions and metabolism
  3. 12. experiment showing organic molecules can form under early Earth conditions
  4. 14. gas present in early Earth atmosphere
  5. 15. conditions on Earth with no oxygen and high temperatures
  6. 17. non living entity that requires a host cell to replicate
  7. 18. hypothesis that RNA was the first genetic material
  8. 19. chemical formation of organic molecules before life existed
Down
  1. 1. amphipathic molecules that form bilayers
  2. 2. deep sea environments providing energy and minerals for early life
  3. 3. separation of internal chemistry from the external environment
  4. 4. method using mutation rates to estimate evolutionary time
  5. 5. theory stating that cells arise from pre existing cells
  6. 6. gas contributing to early Earth greenhouse conditions
  7. 7. high energy radiation reaching Earth without an ozone layer
  8. 8. idea that life arose from non living matter
  9. 10. catalytic RNA molecules
  10. 13. organism from which all life evolved
  11. 16. last universal common ancestor