Changes in the occurrence of alleles within a population over time due to differential reproductive success of individual genotypes.
process by which the genotypes in a population that are best adapted to the environment increase in frequency relative to less well-adapted genotypes over a number of generations.
The main mechanism of evolutionary change. In a given population of organisms, there are heritable characteristics that enable some members to contribute a larger number of offspring than others. If these offspring also have greater reproductive success, then the genetic composition of the population is altered, thus evolution.
differential reproduction and survival of organisms due to environmental forces, resulting in preservation of traits most fitted for survival.
Differential reproductive success. Produces descent with modification, i.e. evolution.
The process by which adaptive traits increase in frequency in a population due to the differential reproductive success of the individuals that possess the traits.
The process by which the fittest organisms survive to pass on their characteristics to the next generation.
The process described by Darwin's theory of evolution that favors certain genotypes and disfavors others. This process is entirely guided by the interaction of an organism with its environment. See also adaptation.
The explanatory principle by which Darwin accounted for biological evolution. It refers to the greater number of offspring reaching sexual maturity shown by individual organisms possessing hereditary attributes that are advantageous in a given environment. Continued natural selection over many generations can result in wholesale changes in bodily form and behavior that may result in the development of new species.
the mechanism for evolutionary adaptation that depends on genetic variation in reproductive fitness within a population. Those individuals with genotypes that provide the greatest reproductive fitness will proportionally more offspring than individuals withless fit genotypes so that the frequency of individuals with the fitter genotype gradually increases from generation to generation.
Chance adaptations that involve a continual adjustment of organisms to their environment, permitting them to survive.
The selection among a group of animals by the forces of nature which allows those of the group best fitted to survive in the particular environment to live and reproduce, while those not fitted to survive die. By this means, the species or group survive and adapt to the environment, the less well adapted members being gradually eliminated over many generations.
Darwin's theory that those who inherit characteristics that help them adapt to their particular environment have a selective advantage over those who do not. go to glossary index
the mechanism of evolutionary change referring to genetic changes in a population due to differential reproductive success of individuals. first discussed by Charles Darwin.
The force that causes some individuals in a population to contribute more descendants (and genes) than others to subsequent generations and so leads to changes in the genetic composition of populations over time (evolution). ( See also Fitness.)
aspects of nature such as weather and food supply affect the characteristics of a species. Animals and plants that adapt to these changes in the environment live and reproduce, while the ones that do not adapt, die.
differential reproduction and survival of individuals that results in elimination of maladaptive traits from a population.
Hypothesis that is part of the theory of biological evolution. States that species have genetic variation within their populations. These variations may constitute adaptations with relation to intraspecific competition or environmental factors, and those better adapted individuals survive long enough to reproduce, thus selectively passing on their inheritable traits. Older version called Darwinism, new version called Neo-Darwinism.
The mechanism for evolutionary change in which environmental pressures cause certain genetic combinations in a population to become more abundant; genetic combinations best adapted for present environmental conditions tend to become predominant.
The resulting survival and reproduction of organisms due to the varying effects of environmental forces on genetically different members of a population; results in the preservation of favorable adaptations.
The process which simply states that the types of creatures which reproduce the most overall will end up with the most numbers in the end (logical, no?). The two classic things which natural selection pushes for are being able to survive longer (and thus having more time to reproduce), and being able to reproduce faster.
The process in nature by which onl...
The process in nature by which only the organisms best adapted to their environment tend to survive and transmit their genetic characteristics in increasing numbers to succeeding generations while those less adapted tend to be eliminated. Charles Darwin is the founder of this concept.
( selection) Differential reproduction of different members of a species due to the variability in fitness among individuals or genotypes, leading to changes in allele frequencies over time.
A process in evolution. Those individuals (of a species) whose traits help them adapt to their specific environment tend to transmit those characteristics. Individuals that are less able to adapt tend to contribute fewer descendents, so that their maladaptive traits decrease or die out.
According to Charles Darwin, the main mechanism giving rise to evolution. The mechanism by which heritable traits which increase an organism's chances of survival and reproduction are more likely to be passed on to the next generation than less advantageous traits.
"As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequent recurrent struggle for existence, it follows that any being, if it varies however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life, will have a better chance of surviving, and thus be naturally selected." Link to a simulation on natural selection. Natural selection tends to reduce heritability because strong (directional or stabilizing) selection leads to reduced variation.
(NAT·· ral se· LEC· tion). Differential success in the reproduction of different phenotypes resulting from the interaction of organisms with their environment. Evolution occurs when natural selection causes change in relative frequencies of alleles in the gene pool.
The differential survival and reproduction of organisms because of differences in characteristics that affect their ability to utilize environmental resources.
The differential contribution of offspring to the next generation by various genetic types belonging to the same population. The mechanism of evolution proposed by Charles Darwin.
The theory, first proposed by Darwin, which holds that organisms produce as many offspring as possible, which compete for limited resources. Organismsâ€(tm) characteristics vary, and certain characteristics will allow organisms to survive and reproduce more effectively. These adaptive characteristics will be more prevalent in subsequent generations. Natural selection is the engine of evolution, choosing the most fit genes to pass from one generation to the next.
the differential reproductive success of individuals within a population‚ the ability of individuals to survive and leave the most reproducing offspring [Go to source
Originally formulated by Charles Darwin and Alfred Russell Wallace; the process by which nature selects the forms most fit to survive and reproduce in a given environment, such as the tropics.
Process by which a particular beneficial gene (or set of genes) is reproduced in succeeding generations more than other genes. The result of natural selection is a population that contains a greater proportion of organisms better adapted to certain environmental conditions. See adaptation, biological evolution, differential reproduction, mutation.
Differential survival and reproduction among members of a population or species in nature, due to variation in the possession of adaptive genetic traits. Natural selection, the major driving force of evolution, is a process leading to greater adaptation of organisms to their environment.
Process by which environmental effects lead to varying degrees of reproductive success among individuals of a population of organisms with different hereditary characters, or traits. The characters that inhibit reproductive success decrease in frequency from generation to generation, see also Sexual Selection
Process that involves reproduction, survival and genetic differences in a species, which results in favorable adaptations and mutations.
The evolutionary process that favors individuals of a species that are best adapted to survive and reproduce.
order by term] level: Comprehensive (3) Biological term referring to constant adaptation through the process of evolution.
level: Comprehensive (3) [ order by level] Biological term referring to constant adaptation through the process of evolution.
a natural process resulting in the evolution of organisms best adapted to the environment
the process in nature by which individuals in a population best adapted to the environment increase in frequency relative to less well-adapted forms over a number of generations.
the process by which nature ensures that only optimized genes are passed onto future generations. Natural selection works against evolution because it does not allow existing genes to evolve.
a natural process that directs the evolution of organisms best adapted to the environment.
A process that occurs in nature whereby strong and well-adapted organisms survive while weak and poorly adapted organisms eventually die out.
A selection of numbers made by the player as opposed to a 'Quick Pick' or 'Lucky Dip' selection.
The three stage process of variation, selection, reproduction (or persistance) that underlies evolution in all areas (in biology the synthesis of Medelian genetics with natural selection is called neo-Darwinism). It is combined within complex systems thinking with self-organization.
a natural process by which organisms leave differentially more/less descendants than other individuals because they possess certain inherited advantages/disadvantages.
Differential reproduction within a population that is correlated with the genotypes of individuals and that is the result of the differential fitness of the genotypes. An example is selection for disease resistance birds that survived an viral environment. Canaries that carried genes that conveyed resistance to disease were more likely to survive and reproduce compared to canaries that lacked such genes. Natural selection is one of the primary (but not the only) mechanisms that result in biological evolution.
An evolutionary process where individuals with favorable genetic characteristics produce relatively greater numbers of surviving offspring.
The differential survival and reproduction of organisms whose genetic traits better adapt them to a particular environment. 11
The directional process of evolutionary change. Some genes or allelles become more common over time because of beneficial effects that they have on survival and reproduction.
the process by which those organisms that are best suited for their environment survive and reproduce
The process through which the individual members of a species that are best suited to survive in their environment are the most reproductively successful. Thus, they pass on more of their genetic material to future generations of the species. Natural selection is the driving force behind evolution itself.
The mechanism of change and survival influenced by adapting to environmental factors.
the process by which an organisms with helpful adaptive qualities are permitted by nature to transmit their genetic information to offspring. It is also the process by which an organism with harmful qualities are removed from the environment.
the process whereby individuals with the most appropriate adaptations are more successful than other individuals, and therefore survive to produce more offspring
see Theory of Evolution
Mechanism of evolution proposed by Darwin. Natural variation, struggle for existence, survival of the fittest and offsprings resembling parents.
A selection of numbers made by the player as opposed to a computer-generated "Quick Pick" selection.
The process by which genetic characters are passed on to successive generations. Over time, natural selection helps species become better adapted to their environment. Natural selection is also known as 'survival of the fittest'; it is the driving force behind the process of evolution.
"survival of the fittest" and the inheritance of modified genes by the offspring.
Charles Darwin's theory of biological evolution, based on the survival and replication of the fittest and most adaptable genes, through competition over limited natural resources.
The concept developed by Charles Darwin that genes which produce characteristics that are more favorable in a particular environment will be more abundant in the next generation.
