Life’s warm, noisy environments seem hostile to quantum effects — yet phenomena like efficient photosynthesis, bird magnetoreception, and enzyme kinetics hint otherwise. This essay proposes an operational definition of “quantum advantage” in biology, outlines concrete experiments (photosynthetic complexes, radical-pair magnetoreception, tunnelling in enzymes), and introduces measurable metrics (coherence, entanglement proxies, quantum-thermodynamic advantage). Emphasizing falsifiable tests, minimal biomimetic systems, and noise engineering, it offers a practical roadmap to confirm or refute whether nontrivial quantum features functionally benefit living systems.
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