Quick Quiz: Nouns Score: Change category, Flip order Reset Incorrect! Try again. Noun: marine mussel Your choice? any of various large turtles with limbs modified into flippers; widely distributed in warm seas an economy that relies chiefly on market forces to allocate goods and resources and to determine prices   (Noun: market economy) large Himalayan goat with large spiraled horns marine bivalve mollusk having a dark elongated shell; live attached to solid objects esp. in intertidal zones