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 study of the race itself and its manner of reaction to diverse environments can give us light on this matter. All characteristics then are hereditary in that they depend upon the germinal material and change as that material is altered. All characteristics are like¬ wise environmental, in that they depend upon the conditions under which development occurs, and change as those conditions are altered. The concepts of the hereditary and the environmental cannot properly be employed in the absolute way now practised, as distinctive of particular characteristics. But their respective rôles can nevertheless be disentangled with precision if they are applied, not to characteristics in themselves, but to the diversities between particular concrete cases. Is colour of skin a [67]