Ads
related to: evolution study guide answers 19
Search results
Results From The WOW.Com Content Network
Evolution is the change in the heritable characteristics of biological populations over successive generations. [1] [2] It occurs when evolutionary processes such as natural selection and genetic drift act on genetic variation, resulting in certain characteristics becoming more or less common within a population over successive generations. [3]
In biology, evolution is the process of change in all forms of life over generations, and evolutionary biology is the study of how evolution occurs. Biological populations evolve through genetic changes that correspond to changes in the organisms ' observable traits .
Evolution of emotion – Study of the evolution of emotions; Evolution of empathy – Capacity to understand or feel what another person is experiencing; Evolution of eusociality – Origins of cooperative brood care; Monogamy in animals – Natural history of mating systems in which species pair bond to raise offspring
The idea of evolution by natural selection was proposed by Charles Darwin in 1859, but evolutionary biology, as an academic discipline in its own right, emerged during the period of the modern synthesis in the 1930s and 1940s. [19] It was not until the 1980s that many universities had departments of evolutionary biology.
A study of four mammalian genera: Hyopsodus, Pelycodus, Haplomylus (three from the Eocene), and Plesiadapis (from the Paleocene) found that—through a large number of stratigraphic layers and specimen sampling—each group exhibited, "gradual phyletic evolution, overall size increase, iterative evolution of small species, and character ...
Embryology theories of Ernst Haeckel, who argued for recapitulation [3] of evolutionary development in the embryo, and Karl Ernst von Baer's epigenesis. A recapitulation theory of evolutionary development was proposed by Étienne Serres in 1824–26, echoing the 1808 ideas of Johann Friedrich Meckel.
The urban ecosystem is a place of extremities and makes for fast evolution. Higher rates of phenotypic change have been observed in urban areas compared to natural and nonurban anthropogenic systems. [7] A field of study has emerged regarding urban evolution in which the adaptations of animals and plants to urban environments are studied.
The idea of a tree of life arose from ancient notions of a ladder-like progression from lower into higher forms of life (such as in the Great Chain of Being).Early representations of "branching" phylogenetic trees include a "paleontological chart" showing the geological relationships among plants and animals in the book Elementary Geology, by Edward Hitchcock (first edition: 1840).