Question: what are the defining characteristics of the phylum porifera quizlet?
Answer: Habitat. aquatic, generally marine., Symmetry. mostly asymmetrical., Level of organisation. cellular level of organisation., Water canal transport. Water enters through minute pores called ostia. ... , Choanocytes. the collar cells that line the spongocoel and the canals., Digestion. ... , Skeleton. ... , Hermaphrodite.