"What characteristic is responsible for the branching off of sponges from the other animals?", "loose aggregate cells (no true tissues)" "What level of organization do they demonstrate?", "cellular-level" "What does the word "Porifera" mean?", ""pore-bearers"" "What is the name of the flagellated cells seen in sponges?", "choanocytes" "What characteristics are used to divide this phylum into classes?", "canal systems & skeletal structures" "When did they show up in the fossil record? What time does the molecular clock information suggest?", "Cambrian period<br /> Precambrian" "Where are they distributed? Where do they live?", "worldwide<br /> ocean" "Tissue layers for the phylum: Porifera?", "no true tissues" "What type of digestion do they have?", "Intracellular" "Type of Asexual Reproduction", "Budding"
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