Name: 

Echinoderm

 
True/False
Indicate whether the sentence or statement is true or false.
 

1. 

Chordates and echinoderms have a common ancestor.
 

2. 

None of the echinoderms living in the oceans today is sessile.
 

3. 

In addition to radial symmetry, echinoderms have a water-vascular system.
 

4. 

The hard, spiny skin of an echinoderm is called an exoskeleton.
 

5. 

All echinoderms except the sand dollar display a five-part radial symmetry.
 

6. 

The adult form of all echinoderms exhibits radial symmetry.
 

7. 

Sea stars are carnivores and are among the most important predators in many marine ecosystems.