cells

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Across
  1. 5. controls photosynthesis
  2. 7. controls the substances that enter or exit the cell
Down
  1. 1. protein synthesis
  2. 2. boundary of a cell
  3. 3. fluid filled space enclosed by a membrane
  4. 4. cell respiration
  5. 5. composed mostly of water, where most chemical reactions take place
  6. 6. controls cell activities and stores genetic information