Biology

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Across
  1. 4. an individual life form
  2. 5. a group of organisms of different species
  3. 7. particular group living in an area
  4. 8. one benefits, the other no benefit or harm
Down
  1. 1. living as a parasite in or on another organism
  2. 2. beneficial to both organisms involved
  3. 3. the surface, atmosphere, and hydrosphere
  4. 6. a community of organisms and their environment