IB Biology at the higher level consists of 180 hours of Theory (knowledge/instruction) covering a range of topics: statistical analysis, cells, the chemistry of life, genetics, ecology and evolution, human health and physiology, nucleic acids and proteins, cell respiration and photosynthesis, plant science, genetics and human health and physiology. In addition, one option topic will be covered. IB Biology students “should acquire a limited body of facts and, at the same time, develop a broad, general understanding of the principles of the subject; as well students become aware of how scientists work and communicate with each other” (IB Biology Course Description). Thus, students are required to complete 60 hours of Practical Work [laboratory investigations (scientific inquiry)], some of which will make up the internal assessment (IA). The IA counts as 20% of the grade awarded by IB.