Final answer:
Mollusks exhibit different characteristics depending on their class, including molting, having a mantle and open circulatory system, having a coelom and closed circulatory system, and having an endoskeleton made of calcium-rich plates.
Step-by-step explanation:
Mollusks exhibit different characteristics depending on the class they belong to.
- Exhibits the phenomenon of molting: Mollusks in class Polyplacophora, also known as chitons, molt their cuticle periodically during growth.
- Has a mantle and an open circulatory system: Mollusks with a mantle and an open circulatory system include gastropods, such as snails and slugs.
- Has a coelom and a closed circulatory system: Mollusks with a coelom and a closed circulatory system include cephalopods, such as squids and octopuses.
- Has an endoskeleton made of calcium-rich plates: Mollusks in class Polyplacophora have an endoskeleton made of calcium-rich plates.