question: What are used for defense by Anthozoans?
choices.text: antigens poisonous darts unicellular organisms Chemicals paramecium antibodies hardened backbone feed on dead protists
choices.label: A B C D E F G H
fact2: Anthozoans are the familiar anemones and corals.
combinedfact: Poisonous darts are used for defense by Anthozoans.
formatted_question: What are used for defense by Anthozoans? (A) antigens (B) poisonous darts (C) unicellular organisms (D) Chemicals (E) paramecium (F) antibodies (G) hardened backbone (H) feed on dead protists