4/12/2017 11:00 AM 42.9/100 e Print Calculator s Periodic Table Question 8 of 14 Sapling Learning Classify the characteristics and organisms as belonging to one of the below phyla Mollusca Annelida Platyhelminthes possess a mantle lack circulatory organs have a gastrovascular possess a visceral mass cavity with one opening earthworms tapeworms octopuses oysters possess a segmented body possess a coelom