Echinoderms Review

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

• True
• False

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

• True
• False

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

• True
• False

What echinoderm is this?

• sea lily 
• sea urchin 
• sea cucumber 
• sand dollar 

Tags

NGSS.MS-LS4-2

What echinoderm is this? 

• sand dollar
• sea urchin 
• sea star
• brittle star

Tags

NGSS.MS-LS4-2

What does the term echinoderm mean?

• tube feet
• star shaped
• spiny skin
• stomach foot

What type of symmetry do adult echinoderms exhibit?

• Asymmetry
• Pentaradial symmetry
• Bilateral symmetry
• Trilateral symmetry

The larva of echinoderms have _____ symmetry.

• Asymmetrical
• Bilateral
• Radial
• None

Echinoderms have an internal skeleton and a system of fluid-filled tubes called a(n)...

• water vascular system
• nervous system
• notochord
• ampulla

Sea stars feed by

• Injecting poison that digests the prey 
• Everting their stomach to digest prey
• Chewing their prey with jaws and teeth
• squeezing their prey until it dies