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Author Question: Which of the following describe(s) echinoderms? A) They have an exoskeleton of h (Read 912 times)

Charlie

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on: Aug 5, 2013
Which of the following describe(s) echinoderms?
A) They have an exoskeleton of hard calcareous plates.
B) Tubefeet provide motility in most species.
C) Digestion occurs completely outside of the organism.
D) Hemolymph circulates in the water vascular system.
E) They are found in both freshwater and saltwater environments.


camila

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Reply #1 on: Aug 8, 2013
Answer has to be B, trust me!


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Charlie

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Reply #2 on: Oct 18, 2013
Wonderful, you were right, thank you so much.


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