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Author Question: A stalked, sessile marine organism has several feathery feeding structures surro (Read 486 times)

Charlie

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on: Aug 5, 2013
A stalked, sessile marine organism has several feathery feeding structures surrounding an opening through which food enters. The organism could potentially be a cnidarian, a lophophorate, a tube-dwelling worm, a crustacean, or an echinoderm. Which of the following traits, if found in this organism, would allow the greatest certainty of identification?
A) the presence of what seems to be radial symmetry
B) a hard covering made partly of calcium carbonate
C) a digestive system with mouth and anus separate from each other
D) a water vascular system
E) a nervous system


camila

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Reply #1 on: Aug 8, 2013
Answer has to be D, 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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