Practice IB Biology Topic A2.1 Origins of Cells with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for A2.1 Origins of Cells and mirrors Paper 1A, 1B, 2 style where relevant.
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In an investigation of the origins of cells, which result would provide evidence supporting the idea that organic molecules can form from inorganic precursors under early Earth conditions?
The electron micrograph shows a section through a eukaryotic cell.
In the micrograph, P is a mitochondrion and Q is the cytoplasm.
Which feature of the cell structures shown in the micrograph is consistent with the endosymbiotic theory?
What is the primary purpose of the swan-neck flask in Pasteur’s experiments?
Which organelles are thought to have originated through the process of endosymbiosis?
Early life on Earth is studied using evidence preserved in rocks and by comparing molecules shared by modern organisms.
Outline what fossil evidence reveals about early life forms.
Describe how molecular data can be used to infer evolutionary relationships among early life forms.
Explain how fossil evidence and molecular data together provide insight into the evolution of early life forms.