Phylum Porifera -

Phylum Porifera - porifera Porifera contain the sponges: the most ancient of all animal groups They originated in the Cambrian period around 600 million years ago porifera Phylum Porifera includes organisms that lack specialized digestive, nervous, and respiratory systems These organisms have a radial symmetry, do

porifera Porifera Examples Sycon is a Genus found within Class Calcarea These sponges are typically radially symmetrical and appear as tubes They are hermaphroditic

porifera Porifera contain the sponges: the most ancient of all animal groups They originated in the Cambrian period around 600 million years ago  The simplest of all the invertebrates are the Parazoans, which include only the phylum Porifera Phylum Porifera (“pori” = pores, “fera” =