ARTHROPODA AND ANNELIDA have organ system level of organization , have bilateral symmetry , are triploblastic , are heterotrophic , have complete digestive system and also show metameric segmentation .
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Arthropods are characterized by an exoskeleton made from chitin, and joint appendages.
They are both bilaterally symmetrical , have spiral and determinate cleavage, coeloms, one way, and protostome digestive tracts.
Arthropods are characterized by segmented bodies, an exoskeleton made from chitin, and joint appendages.
Arthropods have segmented bodies, an exoskeleton made from chitin, and joint appendages. They also have an internal body cavity (hemocoel) and an open circulatory system which employs hemolymph.
Jointed legs, exoskeleton, growth by molting.
Yes, by definition all arthropods are taxonomically related in the sense that they share membership in the same phylum (Arthropoda); although this does not necessarily mean they share a common ancestor.
Yes, all arthropods have brains.
Yes, all arthropods are creatures.