Segmentation occurs in annelids,arthropods,and chordates.What can therefore be concluded about segmentation?
A) Segmentation occurs in all animals.
B) Segmentation occurs only in invertebrates.
C) Segmentation occurs only in vertebrates.
D) Segmentation evolved multiple times.
E) The first animal that gave rise to all other animals was segmented.

Question

Quizplus · Accepted Answer

Segmentation in annelids (a group of invertebrates), arthropods (another group of invertebrates), and chordates (a group that includes vertebrates) indicates that segmentation likely evolved independently in different lineages rather than being a trait inherited from a common segmented ancestor. This suggests multiple evolutionary origins of segmentation.

Segmentation Occurs in Annelids,arthropods,and Chordates