Deuterostome. Anus is formed first.
During embryonic development, a deuterostome's first opening is its anus rather than its mouth. Starfish are a type of phylum that is classified as a deuterostome.
Deuterostomes
. A deuterostome with a backbone
deuterostome ^This is actually false porifera are not segmented animals so thay don't form mouth first(Protostones) or butt first (Deuterostomes) so they are under developed being N/a
Chordata is a deuterostome. During development, deuterostomes form the anus first and the mouth second, whereas in protostomes, it is the opposite. Chordates, including humans, exhibit this deuterostome characteristic during embryonic development.
deuterostomes
protosome
no they are neither deuterostome nor prostome because they dont have an alimentary canal. so how can they be any of them? deuterostome are those in which anus forms first then mouth whereas sponges dont have any organ as they are loose aggregate of cells and digestion is intracellular.
Porifera
Its a deuterostome
They are neither a deuterostome or a protostome, since they only have one opening.