B The larval stage of the ^mollusk is called a ^A) Spicule B) Trochophore ^ ^A The vital organs of a clam are^contained in the visceral ^hump. ^A) True B) False ^B The ----- secretes the calcium^carbonate shell of a mollusk. ^A) Gill B) Mantle ^ ^A Snails scrape the glass walls ^of an aquarium with their ^tongue-like -----. ^A) Radula B) Scolex ^B Clams, oysters, scallops and ^snails are all edible ^bivalves. ^A) True B) False ^B The starfish and sand dollar ^are similar because they are ^both -------. ^A) Mollusks B) Pentaradial ^B The ----- are part of the ^water-vascular system in the ^starfish. ^A) Arms B) Tube Feet ^A A starfish can digest a clam ^without taking the clam into ^its body. ^A) True B) False ^B One type of reproduction in ^the starfish is ^A) Budding B) Regeneration ^ ^A It is useless to try to ^eliminate starfish by cutting ^them up. ^A) True B) False ^
