Is a periwinke a bivalve or a univelve?

What is A distinctive characteristic of the Midwest? How many calories in bowl of porridge with semi-skimmed milk and one teaspoon of sugar? What is name for Indian bread? Where is the ice cream machine on Bin Weevils? What was the price of a pound of potatoes in 1990? What causes celery craving? Is ketchup bad for babies to eat? How do you get sea horse radish? What five stores will Dillard's close in 2009? What does bad canola oil smell like? How much did dubble bubble cost in 1979? How much dough do you scale out to make a pullman loaf? How do you grow banana trees? Where can you sell champagne? Best way to cook asparagus? What is the main ingredient for mayonnaise? How much sugar does a bottle of yazoo have in it? Can you keep one bucktooth tetra in a 5 gallon tank? What bacteria helps you in your intestines to break down food? What are people who overindulge in food and vomit?