B A shark detects vibrations ^from an injured fish through ^sensory cells called the ^A) Gills B) Lateral Line ^B The lamprey, shark and ray ^have a bony skeleton. ^A) True B) False ^ ^A What is the protective cover ^of the gills in fishes called?^A) Operculum B) Placoid ^ ^A ----- produce the bright ^coloration in fishes. ^A)Chromatophores B)Pheromones^ ^A What structure prevents food ^and debris from damaging gill ^filaments. ^A) Gill Raker B) Oral valve ^B A thin-walled sac, the -----, ^allows the lungfish to float ^at any water depth. ^A) Ventricle B) Air Bladder ^A Lampreys have a two-chambered ^heart while frogs have a ^three-chambered heart. ^A) True B) False ^A The ----- membrane is the 3rd ^eyelid in the frog that keeps ^its eyelid moist when on land.^A) Nictitating B) Tympanic ^A The digestive system of the ^frog is a long tube called ^the ----- canal. ^A) Alimentary B) Excretory ^A The frog breathes air through ^its mouth, lungs and skin. ^A) True B) False ^ ^
