CHAPTER 11 Mollusks

The _____ is a fleshy covering that protects the organs.

• mantle

• pod

• visceral mass

• spine

One trait/characteristic that most mollusks share is ______.

• a body that has 2 parts: head and foot.

• a body that has 1 part: head

• a body that has 3 parts: head, foot and body mass.

• a body that has 4 parts: head, foot, stomach and body mass.

Mollusks are ________ symmetrical.

• asymmetrical

• radially

• bilaterally

Which of the following are respiratory organs that facilitate exchange of gases with water

• Gills

• Lungs

Which of the following is the structure that is a skirt-like extension of the upper body wall that produces a shell.

• Radulaq

• Mantle

• Foot

Which of the following is the tongue-like organ that mollusks use to scrape food from surfaces (contains teeth).

• Radula

• Foot

• Mantle

Which of the following is a muscular structure that makes up the lower body mass of mollusks and allows for movement?

• Radula

• Mantle

• Foot

Which of the following mollusk classes contains snails and slugs?

• Chitons

• Cephalopods

• Gastropods

• Bivalves

Which of the mollusk classes contain animals with a two-hinged shell that are filter feeders?

• Chitons

• Cephalopods

• Gastropods

• Bivalves

Which mollusk class includes squid, octopus, and cuttlefish?

• Chitons

• Cephalopods

• Gastropods

• Bivalves