Multiple Choice
In some chordates,the ________ is (are) replaced by ________.
A) pharyngeal pouches; gills
B) dorsal hollow nerve cord; a ventral solid nerve cord
C) gill arches; pharyngeal pouches
D) notochord; a dorsal hollow nerve cord
E) a vertebral column; notochord
Correct Answer:

Verified
Correct Answer:
Verified
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