Read the previous section: Spiral cleavage, an oblique matter. Annelids, arthropods and vertebrates show a remarkable morphological diversity (Chipman, 2010). Beneath this multiplicity of shapes and forms lies a common pattern of body organization—a trunk divided into repeated parts. This pattern and the developmental process that generates it are known as segmentation (Minelli and Fusco, […]
Tag: segmentation
The evolution of segmentation is a controversial topic in biology. Biologists have struggled to answer even the most basic questions. Were our ancestors segmented or not? Has segmentation evolved only once, or has it evolved multiple times independently? What is a segment, after all? The basis of such confusion is partly biological. Biology is complicated, […]