Dr. Stebbins, professor emeritus at the University of California at Davis, earned his right to such praise with the publication of "Variation and Evolution in Plants" in 1950.
Arguments against the conodont polychaete relationship include the fact that scolecodonts change little with time, whereas conodonts exhibit great variation and evolution over time.
Cultivars with single major genes for resistance are prone to resistance breakdown due to pathogen variation and evolution.
After publishing his classic 1950 Variation and Evolution in Plants, he went to U.C. Davis and established its first Department of Genetics.
The scholarly Augustinian order allowed Mendel to spend the years 1856 1863 cultivating some 28,000 pea plants as he investigated heredity, variation, and evolution in plants.
The organization is responsible for producing and distributing the databases, which are designed to facilitate the worldwide cross-cultural and cross-archaeological study of cultural variation and evolution.
Accuracy of these models is based on detailed characterization of the traffic stream measured at points along the network that are subject to constant variation and evolution.
The analysis of the genetic variation and evolution of the Old World hantaviruses in their carrier rodents has shown that the extent of genetic diversity correlates with geographical distance.
Our analysis involves linking the combinatorial nature of epistatic genetic effects to the ancestral graph structure of a population to provide insight into the consequences of epistasis on multivariate trait variation and evolution.
There have been three main philosophical approaches to the problem of defining life that remain relevant today: Aristotle's view of life as animation, a fundamental, irreducible property of nature; Descartes's view of life as mechanism; and Kant's view of life as organization, to which we need to add Darwin's concept of variation and evolution through natural selection (Gayon 2010; Morange 2008).
In 1950, G. Ledyard Stebbins published Variation and Evolution in Plants, which helped to integrate botany into the synthesis.
