9780282556563 - The Biological Problem of to-Day: Preformation or Epigenesis? The Basis of a Theory of Organic Development (Classic Reprint) von Hertwig, Oscar (3 Ergebnisse)

PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000.

Paperback. Zustand: New. Print on Demand. This book delves into the ongoing biological debate about whether organic development stems from preformation or epigenesis. The author, a distinguished scientist, presents a comprehensive analysis of a prominent theory of preformation, known as the germ-plasm theory. This theory posits that the fertilized egg cell contains all the hereditary information necessary for the development of an organism, and that this information is passed down through generations via a specialized substance called the germ-plasm. The author critically examines the germ-plasm theory, arguing that it fails to account for certain aspects of embryonic development. He puts forth an alternative theory based on the concept of epigenesis, which holds that the fertilized egg cell contains only a set of instructions for development and that the actual formation of the organism occurs through interactions with the environment. Through a series of experiments and observations, the author supports his epigenetic theory, challenging the long-held belief in preformation. This book offers a significant contribution to the field of developmental biology, providing new insights into the fundamental processes that shape the growth and evolution of living organisms. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.