question: what is protected from predators and parasites by scales?
choices.text: trout females stomata bacteria cows h2o keratin humans
choices.label: A B C D E F G H
formatted_question: what is protected from predators and parasites by scales? (A) trout (B) females (C) stomata (D) bacteria (E) cows (F) h2o (G) keratin (H) humans