science

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Across
  1. 3. the process of taking in food by an organism and utilizing it
  2. 5. organisms that depend on green plants directly or indirectly for nutrition
Down
  1. 1. organisms that can make their food from simple non-living substances
  2. 2. organism that live in or on other living organisms
  3. 4. a bacteria that can convert atmospheric nitrogen into water soluble compounds