Multiple ChoiceWhich of the following characteristics is common to both cnidarians and sponges?667views
Multiple ChoiceWhich of the following features is characteristic of the poriferan (sponge) body plan or life history? 1363views
Multiple ChoiceWhich type of cnidarians exist only in the polyp form throughout their life cycle?572views
Multiple ChoiceThe choanocyte of a sponge and the nematocyst of a cnidarian both function in __________. 1902views