The Origins of Cells and Cell Theory (Demo)

The origin of cells is a key topic in IB Biology, exploring how the first living structures arose and how modern cells continue to emerge from existing ones. This topic examines the evidence supporting cell theory, the processes that allowed early organic molecules to form, and the likely steps that led to the development of the first prokaryotic and eukaryotic cells. Understanding concepts such as spontaneous generation, endosymbiosis and the continuity of life helps explain how all living organisms share a common cellular ancestry.