What are some differences between echinoderms and arthropods?
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The larval stages of echinoderms are always bilaterally symmetrical, like the one shown here, even though adults are radially symmetrical. ... Unlike mollusks, annelids, and arthropods, echinoderms are not protostomes. The species of the phylum Echinodermata and the phylum Chordata are all deuterostome...
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Echinoderms -they have endoskeleton ,radial symeytery of adult larve have biliteral symeytry ,spiny inverbetris ,simple nervous system ,well developed water system .
starfish ,sand dollars
Arthropods - they have exoskeleton for protecting thiery small body .they have jointed appendges .mainy body parts head ,thorax abdomen .they have well developed nervous system .jointed eyes of light sensitive .
spiders scropicons ,insect like housefly
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