G. Ledyard Stebbins Professions : Botanist Born : January 6, 1906 Died : January 19, 2000 Browse All Authors Famous Quotes by G. Ledyard Stebbins No biologist has actually seen the origin by evolution of a major group of organisms. G. Ledyard Stebbins biologist groups evolution After a greater or lesser number of generations the mutants are eliminated. G. Ledyard Stebbins mutants generations numbers Similar Authors Asa Gray botanist Albert Howard botanist Douglas Houghton Campbell botanist Donald C. Peattie botanist David Fairchild botanist David Douglas botanist All Authors
