Scientists believe that the chordata are closest to the [[arthropoda]] (shelled, joint-legged animals such as [[insect]]s and [[crustacean]]s) and [[annelida]] (earthworms) in biology, due to common features such as [[segment]]ation, which are not seen in other phyla such as the [[mollusca]] (molluscs) or [[coelenterata]] [[jellyfish]] and [[sea anemone]]s. | Scientists believe that the chordata are closest to the [[arthropoda]] (shelled, joint-legged animals such as [[insect]]s and [[crustacean]]s) and [[annelida]] (earthworms) in biology, due to common features such as [[segment]]ation, which are not seen in other phyla such as the [[mollusca]] (molluscs) or [[coelenterata]] [[jellyfish]] and [[sea anemone]]s. |