02564cam a22004093u 4500 47849 UtSlPG 20260610134111.0 m cr n 260607r2015||||utu|||||o|||||||||||||| d UtSlPG en iso639-1 QH QL Weismann, August, 1834-1914 Studien zur Descendenz-Theorie. English Studies in the Theory of Descent (Volumes 1 and 2) Salt Lake City, UT : Project Gutenberg, 2015 1 online resource : multiple file formats text txt rdacontent computer c rdamedia online resource cr rdacarrier Release date is 2015-01-02 Produced by Marilynda Fraser-Cunliffe, Charlie Howard, and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) "Studies in the Theory of Descent" by August Weismann is a scientific publication written in the late 19th century. This work delves into the principles of evolution, focusing significantly on the mechanisms of inheritance and variability in species, particularly in insects. It aims to investigate the interactions between environmental factors and biological development, thereby exploring the complexities and implications of evolutionary theory. At the start of this work, Weismann introduces the concept of seasonal dimorphism in butterflies, where different forms of a species appear at different times of the year, as exemplified by the species "Araschnia Levana". He describes experiments that reveal how environmental influences, such as temperature, can affect the development and characteristics of butterflies, offering insights into the origin of their markings. Weismann challenges existing views on adaptation and establishes a basis for further investigation into how species may evolve and adapt over time, highlighting the significance of both inherited traits and external conditions in shaping biological forms. (This is an automatically generated summary.) Original publication data not identified Insects Heredity Zoology Butterflies Lepidoptera Insects -- Evolution Mechanism (Philosophy) Darwin, Charles, 1809-1882 Meldola, Raphael, 1849-1915 https://www.gutenberg.org/ebooks/47849 88688 88688