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How the law of segregation of alleles explains Mendel's observed ratios
Alexander Fleming photographed in his lab where he observed the natural competition between a fungus
Darwin observed that tortoises on islands that are arid tend to have saddle-shaped shells, allowing
The declining age of menarche over the past 150 years has been measured in many European countries,
Observed Mother–Child Arguments at Five Time Points Over an Eight-Year Period
Plaque morphology phenotypes observed following simultaneous infection