Ch. 16 Echinoderms Test Review

The outermost region of the sea star stomach, the ______________, can be everted or pushed out from the body through the mouth.

• pyloric stomach

• cardiac stomach

• crop

• gizzard

The phylum name, Echinodermata, translates as

• smooth skin

• spiny gut

• spiny skeleton

• spiny skin

Tags

NGSS.MS-LS4-2

In sea stars, the ____________ surface is the top of the animal and contains the madreporite.

• rigid

• anal

• aboral

• oral

The echinoderms are the first group of animals covered that are

• asymmetrical

• deuterostomes

• ecdysozoans

• protostomes

Sea stars typically feed

• on detritus in the sediments

• on kelp

• on bivalves

• on suspended materials

Modern adult echinoderms have a form of symmetry known as

• triradial

• bilateral

• asymmetrical

• pentaradial

Members of the echinoderm class ______________ are called sea stars.

• Asteroidea

• Holothuroidea

• Echinoidea

• Crinoidea

Tags

NGSS.MS-LS4-2

In sea stars, contraction of the _____________ force water into the tube feet of the water vascular system.

• Tiedemann's bodies

• ampullae

• lateral canals

• hemal rings

The __________________ serves as an inlet into the water vascular system.

• ring canal

• stone canal

• tube feet

• madreportie

In sea stars, a(n) _______________ groove runs along the underside of each arm.

• ambulacral

• tube feet

• stone canal

• madreporite