If you rub your finger across the body of an earthworm, you may notice little ripples. Earthworms were among the first organisms to display .

a coelom,

segmentation,

jointed appendages,

an endoskeleton

Earthworms were among the first organisms to display Segmentation

Explanation:

The earthworm is made of about 100-150 segments. This Segmentation helps the movement of the earthworm.

Setae is the muscles and bristles that each segment or section posses. when moving through soil, the Setae helps to anchor and control the Earthworm.

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.