Sea anemones have a(n) __________ that causes them to extend into a feeding position when longitudinal cells __________ and radial cells __________.
A)hydrostatic skeleton; contract; relax
B)endoskeleton; contract; relax
C)exoskeleton; contract; relax
D)hydrostatic skeleton; relax; contract
E)exoskeleton; relax; contract

Question

Quizplus · Accepted Answer

Sea anemones have a hydrostatic skeleton that allows them to extend and retract their tentacles. When the longitudinal cells relax and the radial cells contract, the tentacles extend into a feeding position. Therefore, the correct answer is D, hydrostatic skeleton; relax; contract.

Sea Anemones Have A(n) __________ That Causes Them to Extend