An engraving depicting a diagram of the division of cells to form spermatozoa. From August Weismann's 'the Germ-Plasm: A Theory of Heredity'. London, 1893
An engraving depicting a diagram of the division of cells to form spermatozoa. From August Weismann's 'the Germ-Plasm: A Theory of Heredity'. London, 1893
Crédito:
Album / Universal Images Group / Universal History Archive