Gills and a well developed nervous system
Trilobite
No, echinoderms do not have bilateral symmetry. They have radial symmetry, which means their body parts are arranged around a central axis.
Gills and a well developed nervous system
Appendages.............in multiples of........numbers........and clouds
Echinoderms are mostly marine while arthropods dwell in almost all habitats.
No, a caterpillar is an Arthropod. There are over a million types of anthropoids on earth. Here are three things all arthropods have 1. Chitonous 2. Exoskeleton segmented body 3. Jointed appendages
No, starfish, sea urchins, sand dollars, and their ilk are echinoderms (phylum echinodermata), a different phylum from arthropoda.
The animal with a segmented body is called an arthropod.
Wales
Yes it does
Yes Eventually echinoderms do live in water.
Echinoderms can only be found in water, as they are aquatic. Some characteristics of Echinoderms are: Hard Skin, have arms or spines, have 5 body parts, organs found towards centre of body. Examples: Star Fish, Sea Cucumber, Sea Urchin