Question

What evidence does fetal science provides in the case of the phylum chordata?

Answer 1

Fetal science proves that Phylum Chordata, Hemichordates and Phylum Echinodermata have the same ancestors in spite of living in different conditions amongst diverse surroundings.

At some point in their life cycle, all chordates have a notochord, a dorsal hollow nerve cord, and pharyngeal gill slits. Accumulating evidence shows that echinoderms and hemichordates form a clade (the Ambulacraria) and that within the Chordata, cephalochordates diverged first, with tunicates and vertebrates forming a sister group.