Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog Project Gutenberg 2015-01-02 Public domain in the USA. 223 Weismann, August 1834 1914 Weismann, A. (August) Weismann, Friedrich Leopold August Darwin, Charles 1809 1882 Darwin, Charles Robert Meldola, Raphael 1849 1915 Studies in the Theory of Descent, Volume II 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, Volume II" by August Weismann is a scientific publication written in the late 19th century. This work delves into the concepts of biological development, focusing particularly on the independence and variability of the different stages of metamorphosis in insects. Weismann explores the relationship between larva and imago, or the adult stage, presenting various cases that demonstrate how these stages can exhibit independent variations despite being part of the same organism. At the start of the volume, Weismann introduces the idea that the physical structure of the larva and its corresponding imago can vary independently of each other. He discusses how these variations can manifest differently across species and stages of development, addressing questions about the influences that cause such differences—whether they arise from inherent biological factors or external environmental conditions. Through examples from Lepidoptera, he argues that changes in one developmental stage do not necessarily affect the others, setting the foundation for a deeper investigation into the nature of organismal development and the mechanics of evolutionary change. This opening establishes a framework for understanding variability and adaptation in the context of evolutionary theory, aiming to link morphological changes with environmental interactions. (This is an automatically generated summary.) Reading ease score: 46.8 (College-level). Difficult to read. en Insects Heredity Zoology Butterflies Lepidoptera Insects -- Evolution Mechanism (Philosophy) QH QL Text Category: Science - Biology 702493 2025-09-19T08:59:07.121577 text/html 656669 2024-10-24T13:38:48 text/html 705260 2025-09-19T08:59:17.438559 application/epub+zip 704284 2025-09-19T08:59:09.274568 application/epub+zip 291790 2025-09-19T08:59:08.130563 application/epub+zip 906803 2025-09-19T08:59:23.000516 application/x-mobipocket-ebook 832072 2025-09-19T08:59:16.242523 application/x-mobipocket-ebook 420448 2022-09-21T17:30:01.627743 application/x-mobipocket-ebook 529600 2025-09-19T08:59:05.574600 text/plain; charset=us-ascii 509602 2024-10-24T13:38:48 text/plain; charset=us-ascii 19609 2025-09-19T08:59:23.152480 application/rdf+xml 11081 2025-09-19T08:59:08.384553 image/jpeg 2140 2025-09-19T08:59:08.261548 image/jpeg 633592 2025-09-19T08:59:07.183545 application/octet-stream application/zip en.wikipedia de.wikipedia en.wikipedia en.wikipedia