Wonders of the living world

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Across
  1. 2. An essential requirement for photosynthesis is
  2. 3. the energy needed for photosynthesis is supplied by
  3. 6. most of the animals are
  4. 7. the gas emitted during the process of photosynthesis
Down
  1. 1. the process that creates energy in organisms
  2. 4. a characteristics which can be seen in most plants is
  3. 5. a characteristics that is not common to all living organisms