Multiple Choice
Which lineage of echinoderms is made up of about 950 species of sea urchins and sand dollars, which have their ossicles fused into solid tests that restrict flexibility but provide excellent protection?
A) Holothuroidea
B) Crinoidea
C) Asteroidea
D) Echinoidea
Correct Answer:
Verified
Correct Answer:
Verified
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