Biology Crossword!

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Across
  1. 3. What do livings things remove when egestion occurs?
  2. 4. An ability needed for growing.
  3. 6. Ability from living things that requires energy.
  4. 7. Key word for sensitivity.
Down
  1. 1. What action can be reversed?
  2. 2. Other word for breathing.
  3. 5. A phrase for remembering the characteristics.