You and your friend are at the beach. This friend finds a sponge and for some...
You and your friend are at the beach. This friend finds a sponge and for some reason is about to bite into it. You calmly say, no don't, they have _______ in their body walls.
A. acontia
B. spicules
C. planula
D. spongocytes
Homework Answers
B. Spicules.
These are very small to large needle like structures on the body wall of sponges which are composed of calcium carbonate or silica and they are used by the sponges for structural support and defense from predators.
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