Multiple ChoiceWhich of the following features is characteristic of the poriferan (sponge) body plan or life history? 954views
Multiple ChoiceSome cnidarians go through both a motile stage and a sessile (attached) stage during their life cycle. The attached stage is called a(n) __________. 895views
Multiple ChoiceThe choanocyte of a sponge and the nematocyst of a cnidarian both function in __________. 1450views