A) brachiopod
B) coprolite
C) Etirepterids
D) Balanoglossus.
Correct Answer: D
Solution :
: Balanoglossus belongs to hemichordata which is a small group of marine, solitary or colonial worm-like, enterocoelous animals, most of which live in tubes. They belong to class enteropneusta which have a straight digestive tube with mouth and anus at opposite ends. Balanoglossus has about 20 species. Balanoglossus considered to be connecting link between echinoderms and chordates.
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