Phylum annelida to arthropods, Biology

Q. What is the morphological characteristic that evolutionarily approximates the beings of the phylum Annelida to arthropods?

The metameric feature that is the body segmentation in metameres, approximates annelids to arthropods since these animals are segmented beings too. (Bristles present in polychaete and oligochaete annelids are also covered with chitin, the same substance of the arthropod exoskeleton.)

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