John Tyler Bonner

John Tyler Bonner (May 12, 1920 – February 7, 2019) was an American biologist and professor at Princeton University. He was a leading expert on cellular slime molds and their evolution and development with implications for other organisms. Quotes Merino sheep always flock while Highland sheep spread. The reason is that in Spain the summer feeding and winter feeding of the sheep were widely separated, and the shepherd had to march them many miles along the road and through the villages. If they did not flock, they would soon be lost in their seasonal journey. On the other hand, the Scottish shepherd never moves his Highland sheep large distances and wishes them to spread out as much as possible over the hills so that no one area is overgrazed, and both of these characteristics have been achieved by selective breeding. The Ideas of Biology 146 2002 https://books.google.com/books?id=lv7WIScyD7AC&pg=PA146 (Dover reprint of Harper & Brothers 1962 original) First, there was a selection for an increase in size by becoming multicellular, and once achieved there was a selection for better integration, a better coordination of the adhering cells to compete effectively for energy and for a way to reproduce successfully. Then, which each successive step of size increase, propelled always by the fact the uppermost size niche is never filled, there has been a further selection pressure for integration and coordination, often by new and innovative devices to accommodate the newly created larger organism. First Signals: The Evolution of Multicellular Development 2000 Princeton University Press 7 https://books.google.com/books?id=0yJEHH0cdrMC&pg=PA7 RULE 1 Strength varies with size. RULE 2 Surfaces that permit diffusion of oxygen, of food, of heat in and out of the body, vary with size. RULE 3 The division of labor (complexity) varies with size. RULE 4 The rate of various living processes varies with size, such as metabolism, generation time, longevity, and the speed of locomotion. RULE 5 The abundance of organisms in nature varies with their size. Why size matters: from bacteria to blue whales Princeton University Press 2011 5 https://books.google.com/books?hl=en&lr=&id=DR2hYhzdWLMC&pg=PA5 (pbk edition of 2006 original) External links Category:Biologists from the United States Category:Academics from the United States Category:Educators from the United States Category:1920 births Category:2019 deaths Category:People from New York City