The study of developmental biology shows that

Closely related species will show similarities in embryos The finches that Darwin studied differed in the shape of their beaks.

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in 1972 the fluid—mosaic membrane model of membrane structure was proposed based on thermodynamic principals of organization of membrane lipids and proteins and available evidence of asymmetry and lateral mobility within the membrane matrix [s. j. singer and g. l. nicolson, science 175 (1972) 720–731].