2 public questions tagged with this topic.
Deuterostomes exhibit radial and indeterminate cleavage, and their blastopore develops into the anus. Protostomes show spiral and determinate cleavage.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Hemichordata and Chordata - Protochordata
Deuterostomes encompassing Echinodermata, Hemichordata and Chordata display distinctive deuterostomy where blastopore generated by gastrulation invagination persists as anus while mouth perforates secondarily anteriorly from archenteron tip, hence name mouth second. This program associates with radial indeterminate cleavage supporting regulative development where early blastomeres remain totipotent, enterocoelous coelom formation via archenteral pouches and dorsal hollow nerve cord in chordates. Protostomes show opposite blastopore forming mouth, spiral cleavage and schizocoely, making blastop
Ref: NCERT Class 11 Chapter 4 Deuterostomia; Campbell Biology 12th ed. Chapter 32 Deuterostome Development
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