Animals in this phylum have a rudimentary immune system mediated by grey cells, and their choanocytes digest nutrients.
Animals in this phylum have a rudimentary immune system mediated by grey cells, and their choanocytes digest nutrients. Organisms in this phylum can have asconoid, syconoid, or leukonoid body plans, and they take in food through the ostium. These hermaphroditic organisms can reproduce sexually or asexually by budding. They contain a gelatinous substance called mesohyl, and calcium carbonate spicules serve as their skeletons. Adults in this phylum are asymmetric, sessile invertebrates that eat by filter feeding. For 10 points, name this phylum containing sponges.
Animals in this phylum have a rudimentary immune system mediated by grey cells, and their choanocytes digest nutrients.
{Porifera} [or {sponges} before mention]