ecosystems

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Across
  1. 1. product of photosynthesis
  2. 3. dioxide gas required for photosynthesis
  3. 6. energy for photosynthesis
  4. 7. leaf pigment necessary for photosynthesis
Down
  1. 2. product of photosynthesis
  2. 4. process in cells and tissues that releases energy
  3. 5. the study of living organisms and how they interact with their environment