What is are common characteristic of Mollusks?

body is divided into two regions: head-foot adaptation and the visceral mass

What is one new evolutionary adaptation of Platyhelminthes?

closed circulatory system (blood and blood vessels)

closed circulatory system (blood and blood vessels)

closed circulatory system (blood and blood vessels)

a single shell the grows from the mantel (Ex. snails) or having no shell (Ex. slugs)

having two shells that grow from the mantel and being stationary (Ex. clams)

having no shell and being highly intelligent (Ex. squids)

having regeneration abilities to regrow their head and body (Ex. planarians)

having no shell and being highly intelligent (Ex. squids)

a single shell the grows from the mantel (Ex. snails) or having no shell (Ex. slugs)

having two shells that grow from the mantel and being stationary (Ex. clams)

having regeneration abilities to regrow their head and body (Ex. planarians)

having two shells that grow from the mantel and being stationary (Ex. clams)

a single shell the grows from the mantel (Ex. snails) or having no shell (Ex. slugs)

having no shell and being highly intelligent (Ex. squids)

having regeneration abilities to regrow their head and body (Ex. planarians)

non-parasitic flatworms, that eat other organisms & live in moist environments

parasitic flatworms, that can infect organism who eat contained raw fish

parasitic flatworms, also know as tapeworms, which live in the hosts intestines stealing nutrients

parasitic roundworms (nematodes) which can infect humans through their feet