Echinoderms: Question Preview (ID: 24385)


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Water is pushed into the tube feet by contraction of the
a) stone canal b) ampullae c) radial canal d) sieve plate
Water enters the water vascular system through the
a) mouth b) madreporite c) tube feet d) radial canals
The sea star nervous system consists of a
a) brain and nerve ring b) brain and radial nerves c) nerve ring and radial nerves d) brain, nerve ring, and radial nerves
When feeding the star everts its _____________ onto the soft parts of its prey.
a) stomach b) intestine c) mouth d) gastric glands
The spines of a sea star are used for
a) touch b) protection c) capturing prey d) locomotion
All are echinoderms EXCEPT
a) sea stars b) sea cucumbers c) sand dollars d) sea fans
The echinoderm skeleton is made of
a) chitin b) silica c) calcium carbonate d) bone
All are functions of the water vascular system EXCEPT
a) feeding b) reproduction c) locomotion d) gas exchange
An echinoderm has a(n)
a) exoskeleton b) endoskeleton c) brain d) gizzard
What type of symmetry do echinoderms have?
a) asymmetry b) bilateral c) 5 point radial d) 5 point bilateral
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