Multiple ChoiceWhich of the following features is characteristic of the poriferan (sponge) body plan or life history? 940views
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) __________. 883views
Multiple ChoiceThe choanocyte of a sponge and the nematocyst of a cnidarian both function in __________. 1431views
Textbook QuestionWhich of these characteristics does not apply to cnidarians?a. are diploblasticb. possess a gastrovascular cavity with one openingc. undergo metamorphosisd. have a central nervous system1303views