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Correct answer: A) bio-geographic isolation affects the random changes that take place within gene pools
The bio-geographic isolation of the species takes place when the geographical barrier work as a distinguishing agent. It takes place when the group of animals, plants and other creatures are not allowed to mate with each other.
The mixing of there genes within the same species is separated by the geographical barrier.
The barrier allows the mating of the species in a different way as compared to the previous one.
Biogeographic isolation allows for the change of gene pools over time as (A) biogeographic isolation affects random changes that take place within the gene pool.
Further Explanation:
Evolution is defined as the process of change in the heritable characteristics. This process takes over in time duration of a few generations. The heritable characteristics are the expressions of genes that are passed on from parents to offspring. Evolution may occur through various processes such as genetic drift, natural selection.
Genetic drift is defined as the variation of the relative frequency of varieties of genotype. There is a chance of disappearance of a particular trait from the population.
Natural selection is defined as a process that results in the adaptation of an organism to its environment in which the individual can reproduce and survive.
Gene pool refers to the collection of all available genes that are available to pass down from parents to offspring in the population of single species. The gene pool determines which phenotypes are present in the population at a given period.
Isolation refers to the process in which organisms of the same species are separated as a result of environmental change. This process occurs so that variation can be brought. When organisms become isolated the two groups are not able to reproduce together so, variations and mutations that are confined only to a group.
The following are the five types of isolation;
• Temporal isolation
• Behavioral isolation
• Ecological isolation
• Geographical isolation
• Mechanical or Chemical isolation
Biogeographic isolation refers to the separation of members of different species through geographical or biological barriers. This isolates the reproductive patterns of the members of the same population and results in the new way of mating in the isolated species. The species that are isolated genetically due to mutations and variations. These isolated groups evolved and lead to the formation of new species.
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Answer Details:
Grade: College Biology
Subject: Biology
Chapter: Evolution
Keywords:
Evolution, genetic drift, natural selection, gene pool, mutations, isolation, phenotype, variations, biogeographic isolation, ecological isolation, temporal isolation, behavioral isolation, mechanical isolation, geographic isolation.
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