AP BIOLOGY

Detailed explanation-1: -The mollusks compose the large phylum of invertebrate. They include snails, slugs and other gastropods; clams and other bivalves; squids and other Cephalopoda such as squid, cuttlefish, and octopuses because they possess key characteristics of Mollusca i.e., soft unsegmented body covered with hard calcareous shell .

Detailed explanation-2: -Clams, oysters, snails, chitons, octopi, and squid are all members of the Phylum Molluska. Many people know the mollusks of this area by the seashells they leave behind. Most of these seashells were made and used by mollusks, but some belonged to crustaceans or other marine invertebrates.

Detailed explanation-3: -4. What are the four major mollusks? They are gastropods, bivalves, cephalopods, and scaphopods.

Detailed explanation-4: -Classes in Phylum Mollusca This phylum can be segregated into seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia, Gastropoda, Cephalopoda, and Scaphopoda.

Detailed explanation-5: -Cephalopods are a group of molluscs that include the pearly chambered Nautilus, squids, and the octopus.