Prometheus, or, biology and the advancement of man / by H.S. Jennings.

  • Herbert Spencer Jennings
Date:
[1925]
Catalogue details

Licence: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

Credit: Prometheus, or, biology and the advancement of man / by H.S. Jennings. Source: Wellcome Collection.

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    BIOLOGICAL BACKGROUND at which they develop. If the individ¬ ual A has a certain number of facets, while В and С have a different number, the same in both, it may be found that the difference between A and В is due to inheritance, while the same difference between A and С is due to environment. Such facts are typical; differences due in one case to heredity may be due in another to environment. There is no characteristic distinction between here¬ ditary diversities and environmental diversities ; whether a given instance belongs to one or the other category can be determined only by experimental analysis. Other known cases illustrate the effect of the environment in altering the totality of the organism, its entire personality, as it were. Many years ago. there was discovered in Mexico a [53]