Invertebrates Part II

The only mollusc to retain its external shell is the

• Squid

• Octopus

• Nautilus

• Cuttlefish

How many pairs of legs do decapods have?

• 5

• 7

• 10

• 14

The specialized cells that help cephalopods change color are

• Photophores

• Melanocytes

• Ceratinocytes

• Chromatophores

True or false: Exoskeletons are shells

• True

• False

Most molluscs exhibit what kind of symmetry?

• Radial

• Spherical

• Bilateral

• Biradial

True or False: Crustaceans are related to insects

• True

• False

Arms are different from tentacles because

• They have suckers along their entire length

• They have suckers only at the ends

• They are found only in octopuses

• What are you talking about?! There is no difference

Bivalves have how many shells?

• 1

• 2

• 3

• 4

The specialized feeding appendages of barnacles are called

• Maxilla

• Periopods

• Mandibles

• Cirri

Mollusc hearts have how many chambers?

• 1

• 2

• 3

• 4