Final answer:
Suspension-feeding mollusks with two valves include clams, oysters, mussels, scallops, geoducks, and shipworms.
Step-by-step explanation:
These organisms belong to the class Bivalvia and are enclosed in two-part valves or shells. Bivalves are found in both marine and freshwater habitats. They have a unique feeding method where they filter particles from water using specialized structures called gills.
Food particles are captured by the gills and transported to the mouth through cilia. Bivalves play a crucial role in aquatic ecosystems as filter-feeders. Therefore suspension-feeding mollusks with two valves include clams, oysters, mussels, scallops, geoducks, and shipworms. These organisms are filter-feeders and play a crucial role in aquatic ecosystems.