Chapter 15: Section 2 Question Preview (ID: 2015)


Invertebrates,. TEACHERS: click here for quick copy question ID numbers.

The phylum Mollusca includes ___.
a) octopuses, nematodes, and snails
b) slugs, flukes, and clams
c) slugs, clams, and octopuses
d) squids, annelid worms, and oysters

Slugs and snails are classified as ___.
a) gastropods
b) bivalves
c) cephalopods
d) planarians

Squids and octopuses are classified as ___.
a) gastropods
b) bivalves
c) cephalopods
d) cnidarians

Clams and other two-shelled shellfish are classified as ___.
a) gastropods
b) bivalves
c) cephalopods
d) all of the answers

An octopus has a ___ circulatory system where the heart circulates blood through blood vessels that form a loop.
a) nonexistent
b) partial
c) closed
d) open

Earthworms are classified as ___.
a) flatworms
b) roundworms
c) tapeworms
d) annelid worms

Earthworms have ___ on the outside of their body to help them move.
a) spicules
b) suckers
c) bristles
d) radulas

Annelid worms have ___.
a) segments
b) jointed limbs
c) no segments
d) none of the anwers

In ___ circulatory systems, blood is pumped through vessels that empty into sinuses.
a) no
b) open
c) closed
d) none of the answers

The shell of a snail is secreted by the ___.
a) bristle
b) mantle
c) radula
d) pore

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