1. Multicellular andChapter 9 Tissue Levels ofOrganization 2. Origins of Multicellularity Multicellular lifearose quickly in the100 million years prior to Precambrian/ Cambrian…
Slide 1 1 PHYLUM PORIFERA Sponges are - simplest invertebrate animal - more than 5,000 species - mostly marine, some fresh Their bodies contain pores - thus the name “Porifera”.…