Question

Difference between hemichordata and cephalochordata

Answer 1

Explanation:

Hemichordata and Chordata are two deuterostome phyla. Along with the phylum Echinodermata, Hemichrodata and Chordate belong to a common ancestor. Both hemichordates and chordates are coelomates. Hemichordates are worm-like, marine animals while chordates live in water, land, and air. The main difference between Hemichordata and Chordata is that Hemichordata contains an epidermal nervous system whereas Chordata contains a central nervous system. Chordates contain a dorsal, tubular nerve cord. Both Hemichordata and Chordata contain pharyngeal gill slits. Chordates also contain a post-anal tail. The three classes of hemichordates are Enteropneusta, Pterobranchia, and Planctosphaeroidea. The three subphyla of chordates are Urochordata, Cephalochordata, and Vertebrata.

Answer 2

Hemichordata and Cephalochordata

Explanation:

• The fundamental distinction among Hemichordata and Chordata is that Hemichordata contains an epidermal sensory system though Chordata contains a central nervous system
• The three subphyla of chordates are Urochordata, Cephalochordata, and Vertebrata
• Hemichordates are not classified true chordates, despite the fact that they are closely related
• Some DNA-based investigations of advancement recommend that hemichordates are in reality nearer to echinoderms than to true chordates