Camille Green_21.2 Echinoderms and Rotifers

Camille Green_21.2 Echinoderms and Rotifers

Multiple Choice

What is the complex system of the water-filled tubes that runs through the body?

• central disk

• tube feet

• radial canals

• water-vascular system

Multiple Choice

What is the best known echinoderm?

• starfish

• sand dollars

• brittle stars

• sea cucumber

Multiple Choice

What are the primary parts of a starfish's water-vascular system?

• tube feet

• ring canal

• radial canals

• all of the above

Multiple Choice

What is used to open up shells?

• sessile

• tube feet

• rays

• central disk

Multiple Choice

What are the smallest types of multicellular animals?

• echinoderms

• rays

• rotifers

• eyespot