Worms
Mollusks
Symmetry
Shells and Skeletons
Other Invertebrates
100
Looks like a smooth, thin tube
What is a roundworm?
100
A gastropod with 1 external shell
What is a snail?
100
Many imaginary lines can be drawn
What is radial symmetry?
100
A hard, outer covering
What is an exoskeleton?
100
An invertebrate with an internal skeleton and fluid-filled tubes
What is an echinoderm?
200
Made of linked sections
What is a segmented worm?
200
A bivalve with 2 external shells
What is a clam?
200
Only one line of symmetry can be drawn
What is bilateral symmetry?
200
An internal skeleton
What is an endoskeleton?
200
Invertebrates with stinging cells and a central body cavity
What is a cnidarian?
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