Multiple ChoiceWhich of the following features is characteristic of the poriferan (sponge) body plan or life history? 1views
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) __________. 2views
Multiple ChoiceThe choanocyte of a sponge and the nematocyst of a cnidarian both function in __________. 3views
Textbook QuestionWhich of these characteristics does not apply to cnidarians? a. are diploblastic b. possess a gastrovascular cavity with one opening c. undergo metamorphosis d. have a central nervous system