1.1.2 and 1.2.3

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Across
  1. 2. The act of moving towards (positive) or away (negative) chemicals.
  2. 3. How many years ago did the first life on earth appear?
  3. 4. When two cells exchange DNA plasmids through two pili.
  4. 8. What were the sources of gases in early earth's atmosphere.
  5. 9. A prokaryotic cell
  6. 12. The act of moving towards (positive) or away (negative) light.
  7. 15. Detects light
  8. 16. The first life on earth
  9. 17. The fourth life on earth.
  10. 18. What kind of DNA does a prokaryote have?
  11. 19. Organisms use the energy from the sun to create food and energy.
  12. 20. A eukaryote that has cili for movement.
Down
  1. 1. When two cells split to form copies of themselves. (asexual)
  2. 5. The second life on earth
  3. 6. A eukaryote that has pseudopodium that it uses to move and doesn't have a definite shape.
  4. 7. The third life on earth
  5. 10. A eukaryote that uses a flagella to move and has an eyespot.
  6. 11. Organisms use chemicals to make their own food.
  7. 13. Organisms make their own energy internally.
  8. 14. Organisms get energy by consuming other organisms.