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Author Question: In a tide pool, a student encounters an organism with a hard outer covering that (Read 1132 times)

Charlie

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on: Aug 5, 2013
In a tide pool, a student encounters an organism with a hard outer covering that contains much calcium carbonate, an open circulatory system, and gills. The organism could potentially be a crab, a shrimp, a barnacle, or a bivalve. The presence of which of the following structures would allow for the most certain identification of the organism?
A) a mantle
B) a heart
C) a body cavity
D) a filter-feeding apparatus
E) eyes


camila

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