What was the least complex organism we viewed?Group of answer choicesSpongeHydraPlanarianEarthworm

What is the largest animal phylum in terms of number of species?Group of answer choicesArthropodsMollusksAnnelidsVertebratesRoundworms

Which of the following is NOT an annelid?Group of answer choicesearthwormleechpolychaetecentipedetubeworms

Which group is cylindrical in shape, tapered at both ends, important decomposers, dangerous parasites in plants, humans, and other animals, and are represented by nematodes and heart worms?Group of answer choicesRoundwormsFlatwormsAnnelidsMolluscsCnidarians

Which of the following is not an annelida?1 pointWuchereriaLeechEarthwormNereis

The tapeworm is in the categoryGroup of answer choicesNematodesCestodesTrematodes