Project Gutenberg 2001-11-01 Public domain in the USA. 260 Huxley, Thomas Henry 1825 1895 Huxley, T. H. (Thomas Henry) The Perpetuation of Living Beings, Hereditary Transmission and Variation Lecture IV. (of VI.), "Lectures to Working Men", at the Museum of Practical Geology, 1863, on Darwin's Work: "Origin of Species" Produced by Amy E. Zelmer, and David Widger "The Perpetuation of Living Beings, Hereditary Transmission and Variation" by Thomas Henry Huxley is a scientific publication written in the late 19th century. The book explores the complex phenomena of reproduction, heredity, and variation in living organisms, delving into both asexual and sexual modes of perpetuation. It aims to understand how living beings pass on their traits and how variations arise within species. In this work, Huxley discusses the two primary modes of reproduction: asexual, where organisms reproduce without the involvement of specialized sexes, and sexual, which involves the combination of male and female gametes. He illustrates how offspring generally inherit traits from their parents, a phenomenon he refers to as "atavism," while also emphasizing the role of variation and the influence of external conditions on genetic change. Through various examples, including the breeding of domestic animals and specific cases of spontaneous variation, Huxley demonstrates how both heredity and environmental factors contribute to the diversity of forms in the natural world, thereby laying foundational ideas for understanding evolution and the continuity of life. (This is an automatically generated summary.) Reading ease score: 51.4 (10th to 12th grade). Somewhat difficult to read. en Evolution (Biology) Darwin, Charles, 1809-1882. On the origin of species QH Text Category: Science - Biology 67856 2025-10-02T04:44:56.664231 text/html 62665 2013-01-22T14:27:50 text/html 122748 2025-10-02T04:45:02.324203 application/epub+zip 121339 2025-10-02T04:45:00.084229 application/epub+zip 80114 2025-10-02T04:44:58.899216 application/epub+zip 345462 2025-10-02T04:45:03.858229 application/x-mobipocket-ebook 338018 2025-10-02T04:45:01.565200 application/x-mobipocket-ebook 92692 2022-09-02T06:38:22.447791 application/x-mobipocket-ebook 57240 2025-10-02T04:44:56.433277 text/plain; charset=us-ascii 57221 2009-01-04T10:50:16 text/plain; charset=us-ascii 18317 2025-10-02T04:45:03.975207 application/rdf+xml 25541 2025-10-02T04:44:59.384274 image/jpeg 4673 2025-10-02T04:44:59.140222 image/jpeg 21957 2013-01-22T14:28:18 application/octet-stream application/zip 20862 2009-01-04T10:52:54 application/octet-stream application/zip 123211 2025-10-02T04:44:56.670243 application/octet-stream application/zip 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 en.wikipedia