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7. The Evolutionary Imprint of Physical Evolution in Modern Cells
Summary
This essay argues that modern cellular systems retain a deep structural imprint from prebiotic physical evolution, with membranes and lipid rafts remaining fundamentally physical structures governed by tension, curvature, and microdomain formation. The author proposes that when these physical cellular filters are disrupted -- as by nanoplastics, toxins, or mechanical deformation -- biochemical signaling compensates, revealing an evolutionary continuity between physical and chemical cellular organization.
This essay explains what aspects of prebiotic physical evolution have been preserved in modern cells. According to our hypothesis, modern cellular systems retain a deep structural and functional imprint from the era when physics dominated and chemistry acted only as a supplier of material. Membranes and lipid rafts remain fundamentally physical structures shaped by tension, curvature, permeability, and microdomain formation. When these physical filters fail—such as in the case of nanoplastics, toxins, osmotic stress, or mechanical deformation—control shifts to biochemical signaling and regulation. This transition mirrors the ancient prebiotic dynamic, where physical stability governed raft behavior until chemistry introduced new reactions and feedback mechanisms. Modern cells thus preserve a direct evolutionary echo of the primordial competition between physics and chemistry.