question: What do some jawless fish secrete large amounts of?
choices.text: thick, slimy mucus chondrocytes gills melanin content scales gasoline antigens that cause allergy holding nutrients
choices.label: A B C D E F G H
fact2: Today, jawless fish include the lampreys and hagfishes.
combinedfact: some jawless fish secrete large amounts of thick, slimy mucus.
formatted_question: What do some jawless fish secrete large amounts of? (A) thick, slimy mucus (B) chondrocytes (C) gills (D) melanin content (E) scales (F) gasoline (G) antigens that cause allergy (H) holding nutrients