Expected reproductive success Fitness (often denoted w{displaystyle w} or ω in population genetics models) is the quantitative representation of natural and sexual selection within evolutionary biology. It can be defined either with respect to a genotype or to a phenotype in a given environment. In either case, it describes individual […]

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Level of functional or metabolic efficiency of a living being Health is a state of physical, mental and social well-being in which disease and infirmity are absent.[1] History The meaning of health has evolved over time. In keeping with the biomedical perspective, early definitions of health focused on the theme […]

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