segmented
Segmentation evolved next. Segmentation is the division of the body into multiple parts, or segments. Both the earthworm Phylum Annelida in Figure below and ant Phylum Arthropoda in Figure below have segmented bodies. The earthworm has many small segments. The ant has three larger segments. Segmentation increases an animals flexibility. It allows a wider range of motion. Different segments can also be specialized for different functions. All modern annelids and arthropods are segmented.
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