Photosynthesis

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Across
  1. 2. where photosynthesis happens in a cell
  2. 5. where respiration happens in a cell
  3. 6. part of the energy cycle humans use
  4. 7. the energy cycle is required for this to continue
  5. 8. we can survive three days without it
  6. 9. all energy starts from here
Down
  1. 1. fancy word for sugar
  2. 3. only plants can do this
  3. 4. the gas we breathe out