Biology, 22.10.2019 23:00, shelbyp2003

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?

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In a tide pool, a student encounters an organism with a hard outer covering that contains much calci...