A sponge's structural materials (spicules, spongin) are manufactured by the
A) pore cells.
B) epidermal cells.
C) choanocytes.
D) amoebocytes.
Answer: D
A sponge's structural materials (spicules, spongin) are manufactured by the
A) pore cells.
B) epidermal cells.
C) choanocytes.
D) amoebocytes.
Answer: D
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