Question

What are the key features of chordates? notochord, dorsal tubular nerve cord, pharyngeal pouches, and a tail notochord, dorsal tubular nerve cord, nerve ring, and a tail ventral nerve chord, notochord, pharyngeal pouches, and a tail notochord, ventral nerve cord, water vascular system, and a tail notochord, dorsal tubular nerve cord, water vascular system, and a tail?

Answer 1

I think the correct answer is the first option. The key features of chordates would be notochord, dorsal tubular nerve cord, pharyngeal pouches, and a tail. These features appears in some period of their lives. They are deutorostomes where the anus would be formed first before the mouth.