IB Bio Origin of Life A2.1

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Miller and Urey Experiment

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Demonstrated that simple inorganic compounds could produce simple organic molecules, including amino acids, which are the building blocks of life.

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Primordial Soup Hypothesis

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The idea that Earth's early oceans contained organic molecules that eventually led to the formation of the first life.

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Chemical Evolution

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The process that explains the formation and development of organic molecules that eventually led to the emergence of life on Earth.

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Purpose of the Miller-Urey Experiment

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To simulate the conditions of early Earth and test the hypothesis that organic molecules could have formed from inorganic precursors.

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Mitochondria and Chloroplasts

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Organelles that contain their own DNA, similar to bacteria cells, supporting the endosymbiotic theory.

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Endosymbiotic Theory

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The theory that mitochondria and chloroplasts originated from free-living bacteria that were engulfed by ancestral eukaryotic cells.

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Organic Molecules

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Molecules that contain carbon and are the basis for all known life forms.

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Inorganic Compounds

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Substances that do not contain carbon-hydrogen bonds, often considered the building blocks for organic molecules.

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Amino Acids

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Organic compounds that serve as the building blocks of proteins, essential for life.

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Biogenesis

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The principle that living organisms arise from pre-existing life, contrasting with abiogenesis.