Multiple Choice
The ___ Echinoderm lineage is made up of sea cucumbers, which are elongated along their oral-aboral axis and have a well-developed circulatory system.
A) Echinoidea
B) Ophiuroidea
C) Crinoidea
D) Holothuroidea
E) Asteroidea
Correct Answer:

Verified
Correct Answer:
Verified
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