Q1. Archeocyathids were the first major group of invertebrates to go extinct. Speculate as to the reason for their extinction
Q2. True or False: Sponges could be a source of silica for the formation of Paleozoic cherts.
Q3. On what area of a reef would you expect stromatoporoids to be most abundant?
Q4. All known classes of Porifera evolved by the end of the Ordovician Period: True or False
Q5. Sponges probably had their greatest diversity during the Mississippian-Pennsylvanian Periods: True or False
Q6. Sponge cells that bear flagella and drive feeding currents are: ____________