You find a small, elongated animal embedded in the sand with one end sticking out. Among other things, it has segmental musculature, a coelom, a notochord, and a complete digestive tract with an anus located partway down the body. This animal is
A) an annelid.
B) a larval echinoderm.
C) either a larval echinoderm or a chordate.
D) a chordate.
Answer: D
Biology & Microbiology
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