what are the conditions necessary for natural selection?
9940
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
1049244
['Environmental changes.', 'Cultural/mating preferences.', 'Population Immigration.', 'Genetic Mutation.']
550777
['Population size: number of individuals in the gene pool.', 'Population density: number of individuals in a given area.', 'Population distribution: pattern of distribution (uniform, random, clumped)', 'Age structure: pre-reproductive, reproductive, post-reproductive.']
656938
['A. It should be universally accepted.', 'B. It should be invariable and not perishable.', 'C. It should be easily available & easy to reproduce.', 'D. All of these.']
1328561
Natural selection is the mechanism that drives the evolution of adaptations. ... The difference between adaptation and natural selection is that adaptation is the characteristic while natural selection is the mechanism that increases the probability that an advantageous characteristic is passed on and becomes commonplace.
403223
Natural selection describes the unequal survival and reproduction that results from the presence or absence of particular traits. According to Darwin evolution occurs through the process of natural selection.
1343974
Natural selection acts on existing heritable variation. Natural selection needs some starting material, and that starting material is heritable variation. For natural selection to act on a feature, there must already be variation, and that variation must be able to be passed on to offspring.
1190388
Evolution is a gradual change in the inherited traits of a population over many generations. Natural selection is a mechanism where the members of a population best suited to their environment have the best chance of surviving to pass on their genes.
278032
['(1) A Mating Relationship:', '(2) A form of Marriage:', '(3) Some rules of mate selection:', '(4) A system of Nomenclature:', '(5) An economic provision:', '(6) A common habitation:']
1268567
['abiotic (non-living) ones, namely light (or lack thereof), pressure, currents, temperature, oxygen, nutrients and other chemicals; and.', 'biotic ones, that is, other organisms that may be potential predators, food, mates, competitors or symbionts.']
402101
Natural selection. Natural selection is a process where organisms that are better adapted to an environment will survive and reproduce. This means that the advantageous alleles of this variant organism are passed on to offspring. Over many generations, the process of natural selection leads to evolution occurring.
828813
Ecological selection is natural selection via any means other than sexual selection, such as kin selection, competition, and infanticide. Following Darwin, natural selection is sometimes defined as ecological selection, in which case sexual selection is considered a separate mechanism.
200924
The mechanism that Darwin proposed for evolution is natural selection. Because resources are limited in nature, organisms with heritable traits that favor survival and reproduction will tend to leave more offspring than their peers, causing the traits to increase in frequency over generations.
501393
Neither gene selection nor species selection has molded the advantageous characteristics of individual organisms; rather, they have affected properties at the gene level or at the species level. But individual selection, selection among individual organisms within populations, is at the center of evolutionary theory.
865393
According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.
150414
Natural selection, a concept first introduced by British naturalist Charles Darwin in 1859, is a cornerstone of biology that says evolution is driven by organisms passing along beneficial traits that help them survive and reproduce while weeding out unfavorable ones.
1259382
Answer and Explanation: The result of natural selection is usually an organism that is better suited to live in its environment because natural selection allows the heritable traits of the fittest individuals to be passed on to future generations. Natural selection also does not cause new traits to appear.