Sponges are generally protected from predators by the presence of calcium and silica crystals. These crystalline structures are called
A) amoebocytes.
B) osculum.
C) choanocytes.
D) spicules.
E) spongin.

Name: Sponges are generally protected from predators by the presence of calcium and silica crystals. These crystalline structures are called A) amoebocytes. B) osculum. C) choanocytes. D) spicules. E) spongin.
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Question

Quizplus · Accepted Answer

The crystalline structures that protect sponges from predators are called spicules.

Sponges Are Generally Protected from Predators by the Presence of Calcium