Arthropods and Echinoderms Anatomy and Functions

Which of the following organisms is NOT an echinoderm?

• sea cucumber
• sand dollar
• nudibranch
• brittle starfish

With regard to body cavities, how are echinoderms classified?

• Deuterostome coelomate
• Protostome coelomate
• Deuterostome acoelomate
• Protostome acoelomate

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 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

What phylum do echinoderms belong to?

• Cnidaria
• Porifiera
• Echinodermata
• Chordata

Which is an example of an Asteroidea member?

• sea star
• sea cucumber
• sea urchin 
• sand dollar 

What echinoderm is this?

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