PPSCFPSCNTSPakistan govt jobs
- Subject
- Biology Mcqsbiology-mcqs
- Published
- 23 May 2018
- Last updated
- 28 May 2026
Explanation
The exoskeleton of marine snails is mainly composed of calcium carbonate (CaCO3), which provides structural strength and protection. Other compounds like calcium phosphate, calcium sulfate, or silicon dioxide are not typical components of their shells.
More Biology Mcqs
Practice related questions from the same subject.
- 1.Which field of study focuses on the cultivation of crops and the management of soil?
- 2.What does pedology focus on studying?
- 3.What is another name for mitochondria?
- 4.Which field focuses on examining the interactions between antigens and antibodies present in the blood?
- 5.Which scientific discipline focuses on organizing and categorizing living organisms?
- 6.In the scientific name Homo sapiens, which two taxonomic categories are represented by the Latin terms?
- 7.Which virus is responsible for causing rabies?
- 8.Which of the following conditions is commonly associated with multiple opportunistic infections?