One of the defining characteristics of chordates and other deuterostomes is the presence of gill slits, which first appeared in the acorn worm and persist vestigially in the human embryo. …read more
Source:: Science
One of the defining characteristics of chordates and other deuterostomes is the presence of gill slits, which first appeared in the acorn worm and persist vestigially in the human embryo. …read more
Source:: Science