Answer to Question #281360 in Zoology for Applied Biology

Question

explain evolutionary history advances of subphylum vertebrata over sub-phylum cephalochordate

Answer 1

The lancelets are also called cephalochordates (Greek: kephale, “head”) because the notochord extends from near the tip of the tail to well into the anterior of the body. Because they do not have the braincase, or cranium, of a vertebrate, lancelets are often called acraniates.