Evolution and Natural Selection

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Across
  1. 3. best evidence for evolution
  2. 5. the capital letter in a Punnett square (two words)
  3. 7. organisms that don't respirate
  4. 9. random change in DNA that alters the allele
  5. 14. Idea that fossils higher up are younger
  6. 16. Your body's cells, has a nucleus
  7. 17. Change over time due to natural selection occurring
  8. 18. exact dating by measuring half lifes
Down
  1. 1. fitness is determined by the number of
  2. 2. asexual reproduction
  3. 4. powerhouse of the cell
  4. 6. The lowercase letter in a Punnett square (two words)
  5. 8. more fit to live/ most adapted will survive and reproduce (two words)
  6. 10. bacteria with no nucleus
  7. 11. the principle that events in the past occurred suddenly
  8. 12. The "Father of Evolution" (two words)
  9. 13. bacteria-killing medication
  10. 15. sexual reproduction