question: the work horses of the sponge have tiny hairs that trap what?
choices.text: tissue keratin particles light cartilage as a base prokaryotes antigens
choices.label: A B C D E F G H
fact2: Collar cells are the work horses of the sponge.
combinedfact: the work horses of the sponge have tiny hairs that trap the particles
formatted_question: the work horses of the sponge have tiny hairs that trap what? (A) tissue (B) keratin (C) particles (D) light (E) cartilage (F) as a base (G) prokaryotes (H) antigens