crossword

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Across
  1. 3. the structure of columns and rows
  2. 4. is a...
  3. 5. place of contact between two neurons
  4. 6. the process of human development for long time
  5. 7. C3H8
Down
  1. 1. source of energy in cell
  2. 2. Favorite theorem of Nurasyl
  3. 3. a process of cell division