How long should a refrigerator last? This questions is asked so many time, again and again. Most refrigerator keep operational more than 10 years. A survey conducted by the appliance magazine found out that 80% of refrigerators last 8-14 years.
There are 5 main classes of mollusks, and two smaller classes that most people have never heard of. The principle classes are: Gastropoda (gastropods) - snails, slugs, conchs, whelks, cowries, etc. Bivalvia (bivalves) - clams, mussels, oysters, cockles, scallops, etc. just now. Report Abuse. The living mollusks are placed into seven classes (some workers combine the Solenogastres and Caudofoveata into a single class called Aplacophora): Solenogastres Caudofaveata Polyplacophora Scaphopoda Cephalopoda Bivalvia Gastropoda There are over 50,000 different types of mollusks alive today.
1 Gastropods (Gastropoda) - There are between 60,000 and 80,000 species of gastropods alive today. 2  Gastropods are the most diverse of the mollusk groups. 3  Members of this group include limpets, top shells, periwinkles, sundial shells, sea hares, nudibranchs, snails and slugs.ollusks are classified within the following taxonomic hierarchy: Animals Invertebrates. Mollusks are divided into the following taxonomic groups: 1  Caudofoveates and solanogastrates (Aplacophorans) - There are about 70 species of caudofoveates and 250 species of solanogastrates alive today.