Echinoderms

... cilia about 100 modern species Cycliophora Wheel carrying Symbion Circular mouth surrounded by small cilia at least 3 Echinodermata Spiny skin Echinoderms Five-fold radial symmetry in living forms, mesodermal calcified spines about 7,000 extant and 13,000 extinct species Echiura Spine tail ...

See entire post

... will see that he/she is very much interested in colorful aquarium/marine fishes as well. Get them to an aquarium containing big marine molluscs or echinoderms, they will also watch those keenly. But, they will never take a glance at any small molluscs like snails or bivalves. Neither will they ...

See entire post

... what words have been used here before, so apologies in advance if I repeat one... I'm gonna choose a tough one.... A structure found in certain echinoderms.... ------ (P.S. This place seems not too active... how many people post here on a given day? I'm referrint to all of biology-online..) ...

See entire post

... what words have been used here before, so apologies in advance if I repeat one... I'm gonna choose a tough one.... A structure found in certain echinoderms.... ------ (P.S. This place seems not too active... how many people post here on a given day? I'm referrint to all of biology-online..)

See entire post

... is asimple , fluid-filled cell and is found in animals such as amebas . In higher invertebrates such as coelenterates , nematodes , annelids , and echinoderms , water held inside the body is shifted by muscles to bring about a change in shape or position of the animal . (........4.......) . Muscles ...

See entire post