The skeleton of sponges is made up of which of the following?:
Correct answer: C. Both A and B
- A. Calcium
- B. Silica
- C. Both A and B
- D. None of these
Explanation
The skeletal structures of sponges are spicules and spongin fibres. Spicules are formed by carbonates of lime or silica in the form of needle-like pieces so, calcium and silica both are correct.
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