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Studies in the Theory of Descent, Volume II

By August Weismann
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About This Book

A series of empirical and theoretical essays investigates how developmental stages and heredity influence evolutionary change. Focusing largely on Lepidoptera, the text shows that larval, pupal, and adult forms can vary independently, analyzes patterns and causes of variability, and examines correlations among traits. It evaluates natural selection as an agent shaping form in relation to life history, critiques the inheritance of acquired characteristics, and distinguishes mechanisms of somatic versus germ-line transmission. Comparative observations, examples, and logical argumentation are combined to clarify how morphological change and stability arise across generations.

About the Author

Weismann, August portrait

August Weismann

August Weismann was a prominent German biologist known for his foundational contributions to the field of evolutionary theory. He is best recognized for his work on heredity and the concept of germinal selection, which he articulated in his influential book "On Germinal Selection as a Source of Definite Variation." Weismann's theories challenged prevailing notions of inheritance and laid the groundwork for modern genetics. His two-volume work, "Studies in the Theory of Descent," further explored the mechanisms of evolution and the role of natural selection. Through his extensive research and writings, Weismann significantly shaped the understanding of biological evolution and heredity.

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Essays Upon Heredity and Kindred Biological Problems / Authorised Translation cover Essays Upon Heredity and Kindred Biological Problems / Authorised Translation by August Weismann On Germinal Selection as a Source of Definite Variation cover On Germinal Selection as a Source of Definite Variation by August Weismann Studies in the Theory of Descent (Volumes 1 and 2) cover Studies in the Theory of Descent (Volumes 1 and 2) by August Weismann Studies in the Theory of Descent, Volume I cover Studies in the Theory of Descent, Volume I by August Weismann The Evolution Theory, Vol. 1 of 2 cover The Evolution Theory, Vol. 1 of 2 by August Weismann The Evolution Theory, Vol. 2 of 2 cover The Evolution Theory, Vol. 2 of 2 by August Weismann

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