Hint | Answer | % Correct |
---|---|---|
Exoskeleton, segmented body, and joint legs | Arthropoda | 82%
|
Members include the starfish and sea urchin | Echinodermata | 68%
|
Sponges; represent transition from unicellular to multicellular life | Porifera | 66%
|
Segmented worms that have a clear head and tail | Annelida | 63%
|
Transition through a two-stage life | Cnidaria | 61%
|
Have a fluid-filled cavity surrounded by the mesoderm | Mollusca | 56%
|
Flatworms with symmetrical bodies | Platyhelminthes | 54%
|
Roundworms; first to have a digestive tract with two openings | Nematoda | 51%
|
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