Multiple Choice
How much nervous system does an echinoderm have? Sea stars have
A) a complex of nerve ganglia in each ray.
B) a central nervous system including a brain.
C) a simple nerve ring and radial nerves leading to simple sensory cells scattered over the epidermis.
D) no genuine nerve cells are found in echinoderms;they operate completely by a hydraulic system.
Correct Answer:
Verified
Correct Answer:
Verified
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