The Vase-Like Body of a Simple Sponge Is Likely to Contain

question 14

Multiple Choice

The vase-like body of a simple sponge is likely to contain all of the following materials or layers except

• A)a digestive cavity lined with enzyme-secreting cells.
• B)mesophyl,a protein-rich matrix.
• C)a somewhat contractile outer epithelium.
• D)specialized collar cells or choanocytes.
• E)spicules or a spongin skeleton,or both.

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Definitions:

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