William e castle edwin g conklin (3 resultados)

Paperback. Condición: New. Print on Demand. This book explores the fascinating phenomenon of head formation in the flatworm Planaria. Through a series of detailed experiments, the author demonstrates that the frequency of head formation in Planaria can be controlled by exposing the worms to specific concentrations of various anesthetics. The author's findings challenge the prevailing view that head formation is a purely genetic phenomenon. Instead, their research indicates that environmental factors, specifically the presence of certain chemicals, play a significant role in determining how often heads form in Planaria. This discovery opens up new avenues for understanding how organisms develop and how their form and function are shaped by their environment. The book provides a valuable resource for biologists and anyone interested in the intricate processes of regeneration and development. 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.…

Paperback. Condición: New. Print on Demand. This book presents an in-depth analysis of the relationship between cell size and nuclear size during various stages of normal development. Using a variety of species, the author examines the factors that influence cell division and growth, including the unequal distribution of yolk, experimental alterations, and the variations in size among different cell types. The author provides a detailed account of cell lineage, focusing on the early differentiations of the developing egg. By studying individual blastomeres throughout the cleavage period, the author explores the relationship between nuclear growth and the increase in chemical substances and processes during cleavage, offering insights into senescence, rejuvenescence, and the ratio of nucleus to plasma. This book contributes to our understanding of the fundamental principles governing the development and differentiation of cells, providing a valuable resource for researchers in developmental biology and cell biology. 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.…

Paperback. Condición: Brand New. 668 pages. 8.75x5.75x1.51 inches. This item is printed on demand.