Which one of the following feature is found in Chordates but not in non-chordates?
A. Gills
B. Spiracles
C. Chitinous exoskeleton
D. Post anal tail
Answer:B
Which one of the following feature is found in Chordates but not in non-chordates?
A. Gills B. Spiracles C. Chitinous exoskeleton D. Post anal tail