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The middle layer in body wall of porifera is or The non-cellular layer present between pinacoderm and choanoderm in body wall of poriferans is known as
A. Mesoderm
B. Mesenchyme
C. Mesogloea
D. Mesentery

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Correct Answer - B
(b) In porifera, bodywall is with outer pinacoderm (ectoderm) inner choanoderm (endoderm) and gelatinous noncellular mesenchyme in between.

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