The Eight Phyla of Invertebrates - Statistics

General Stats

Answer Stats

Hint	Answer	% Correct
Exoskeleton, segmented body, and joint legs	Arthropoda	83%
Members include the starfish and sea urchin	Echinodermata	71%
Sponges; represent transition from unicellular to multicellular life	Porifera	67%
Segmented worms that have a clear head and tail	Annelida	65%
Transition through a two-stage life	Cnidaria	61%
Have a fluid-filled cavity surrounded by the mesoderm	Mollusca	59%
Flatworms with symmetrical bodies	Platyhelminthes	56%
Roundworms; first to have a digestive tract with two openings	Nematoda	53%

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