Cross word of doom

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Across
  1. 4. cell does photosynthesis
  2. 6. take water from the ground into the roots
  3. 8. carries water around the plant
Down
  1. 1. also a necessary asset to a plant but it comes from the sky
  2. 2. a necessary asset to a plant and it comes from the ground
  3. 3. a byproduct of the plant respiration
  4. 5. holds the plant up
  5. 7. also a by product of the respiration process
  6. 9. a part of the plant on the stem