A. Calcium
B. Silica
C. Both of these
D. None of these
Related Mcqs:
- The skeleton of the sponges is in the form of variously shaped needle like structures called___________??
- Sponges have skeleton of:
- Which of the following minerals is maximum in the bone:
- The chemical name of bleaching powder is
- Portland cement is a finely ground
- Temporary hardness of water is caused by
- Which of the following animal has a hydrostatic skeleton??
- Which of the following kidney stones are most common??
- Dolomite:
- The chemical used in generating acetylene is
