Echinoderms are considered:

• monoblastic with only one germ layer

• diploblastic with two germ layers

• triploblastic with three germ layers

• quadroblastic with four germ layers

Echinoderms are considered

• Acoelomate deuterostomes

• Acoelomate protostomes

• Coelomate deuterostomes

• Coelomate protostomes

The word Echinoderm means this

• lily-like

• water polyp

• five arms

• spiny skin

What type of skeleton is found in Echinoderms

• exoskeleton

• endoskeleton

• they lack a skeleton

Which of the following structures do NOT take the place of the brain in an Echinoderm

• nerve ring

• radial never

• nerve net

• ganglia

Another name for the papulae is?

• skin gills

• tube feet

• dermal spines

• pedicellariae

What is the name of the digestive glands in the starfish?

• intestines

• pyloric caeca

• salivary glands

• tiedemann's bodies

The internal stomach used for continuous digestion is callled

• cardiac stomach

• bolus stomach

• pyloric stomach

• ventral stomach

The stomach which an echinoderm can push out through its mouth is called the

• cardiac stomach

• bolus stomach

• pyloric stomach

• dorsal stomach

Deuterostomes are animals in which the blastopore develops into the

• mouth

• anus

• brain

• gonads