Transform Boundaries The final type of boundary is one where the two plates slide against each other in a sideways motion. These boundaries between plates is referred to as transform boundaries.
The three regions of the body of the Mollusk are the head-foot, the visceral mass, and the mantle-shell.
The group includes snails, slugs, scallops, clams, octopuses, cuttlefish, oysters, etc. The body size of mollusks vary from microscopic to huge. The largest mollusk is the giant squid with the body size of 15 m long and weigh up to about 250 kg.The characteristic feature of all mollusks is the presence of mantle, a thick epidermis, which covers the dorsal side of the body.ll the mollusks except cephalopods have muscular foot as the organ of locomotion. Other than for locomotion, muscular foot is also used for attachment, food capture, digging, etc. All the organs including excretory, digestive and reproductive organs are found in a visceral mass.