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Molecular biologists discovered deoxyribonucleic acid (DNA), the molecule that codes for genes. Every organism's genetic makeup is encoded within strands of this molecule, and the science of molecular Biology provided an enormous boost for explaining the role of random mutations in evolution. Darwin had done an excellent job in describing the role of natural selection, but the incorporation of the discoveries of molecular biology into evolutionary biology became known as the "modern synthesis."

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12y ago

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