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  1. obtain food from non-living organic material symbiosis
  2. mutually positive arrangement between species conjugation
  3. response to a chemical host
  4. response to light chemotaxis
  5. member of phylum Foraminifera taxis
  6. organism's response to a stimulus eukaryote
  7. cell with membrane-bound structures radiolarian
  8. organism in which a parasite is growing saprophyte
  9. sexual reproduction in some protozoans phototaxis