Mollusca

Are Mollusca a true coelom?

• yes

• no

Which class does not have open circulatory system?

• Bivalvia

• Cephalopoda

• Gastropoda

• Polyplacophora

Why is an open circulatory system not as good as a closed circulatory system?

How many dorsal plates does Polyplacophora have?

• 4

• 6

• 10

• 8

Where are the gills in the Polyplacophora?

• Under them

• between the foot and the mantle

• On their head

• They don't have gills

When are Gastropods bilaterally symmetrical?

• When they have a shell

• When they are shell-less

What is a radula used for?

• cutting and chewing food

• to move

• for protection

• to see

How gills do Gastropods have?

• 1

• 3

• 2

• 4

What has the foot and radula turned into in the class Cephalopoda

• hairs

• nails

• toes and fingers

• arms and tentacles

Tags

NGSS.MS-LS4-2