Biology Crossword

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Across
  1. 3. positive charge
  2. 5. occurs in the mitochondria
  3. 7. makes proteins
  4. 8. changes in a species overtime
  5. 9. attracts the same substances
  6. 10. study of heredity
Down
  1. 1. builds cell parts
  2. 2. change to an organisms dna
  3. 4. both alles are expressed
  4. 6. control center of the cell