What is the Hemichordata phylum?
Q: What is the Hemichordata phylum?
A: The Hemichordata is a phylum of worm-shaped marine deuterostome animals.
Q: What is the relationship between the Hemichordata and echinoderms?
A: The Hemichordata is generally considered the sister group of the echinoderms.
Q: When did the Hemichordata first appear?
A: The Hemichordata date back to the Lower or Middle Cambrian.
Q: What is the significance of graptolites in relation to the Hemichordata?
A: Graptolites are an important class of fossils within the Hemichordata, most of which became extinct in the Carboniferous.
Q: How many living classes are there within the Hemichordata phylum?
A: There are two living classes within the Hemichordata phylum: the enteropneusts and the pterobranchs.
Q: Why are the Hemichordata of great interest to those studying chordate development?
A: Since the Hemichordata are the closest living relatives to the chordates, they are of great interest to those studying the origins of chordate development.
Q: What are the two living classes of Hemichordata?
A: The two living classes of Hemichordata are the enteropneusts and the pterobranchs.
