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2. Explore "Reproductive Barriers" at https://learn.genetics.utah.edu/content/evolution/barriers/ to complete the following table: Organism How were they isolated Subpopulation changes Stickleback fish Ground Squirrels Crickets Warbler Fireflies Coral Monkeyflowers Beetles Cotton Sea Urchins

2. Explore "Reproductive Barriers" at https://learn.genetics.utah.edu/content/evolution/barriers/ to complete the following table: Organism How were they isolated Subpopulation changes Stickleback fish Ground Squirrels Crickets Warbler Fireflies Coral Monkeyflowers Beetles Cotton Sea Urchins

Biology (MindTap Course List)
Biology (MindTap Course List)
11th Edition
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Chapter20: Speciation And Macroevolution
Section: Chapter Questions
Problem 2TYU: The reproductive isolating mechanism in which two closely related species live in the same...
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2. Explore "Reproductive Barriers" at https://learn.genetics.utah.edu/content/evolution/barriers/ to complete the following table: Organism How were they isolated Subpopulation changes Stickleback fish Ground Squirrels Crickets Warbler Fireflies Coral Monkeyflowers Beetles Cotton Sea Urchins 3. Reproductive isolation reduces GENE FLOW between populations This means that each subpopulation evolves separately and can result in a new species. Isolating
Transcribed Image Text:2. Explore "Reproductive Barriers" at https://learn.genetics.utah.edu/content/evolution/barriers/ to complete the following table: Organism How were they isolated Subpopulation changes Stickleback fish Ground Squirrels Crickets Warbler Fireflies Coral Monkeyflowers Beetles Cotton Sea Urchins 3. Reproductive isolation reduces GENE FLOW between populations This means that each subpopulation evolves separately and can result in a new species. Isolating
Geographic isolation is an isolating mechanism in nature. Over long periods of time, it can lead to speciation. As the name suggests, geographic isolation is when populations of a species become separated geographically. This could also happen from the founder effect, where a small group breaks away from a larger population and establishes a group in an isolated area. Isolation could also occur when a geographic event, like an earthquake or a landslide separates a population. Once the populations are separated evolution can occur through multiple mechanisms. Natural selection could act on each population, where some individuals have favorable traits for survival. Genetic drift can occur, where genotypes become more common due to random chance. These mechanisms can lead to each subpopulation becoming so different, that they can no longer interbreed and are considered separate species. TIME ●00 • ORIGINAL GEOGRAPHIC REPRODUCTIVE SPECIATION POPULATION BARRIER ISOLATION 1. We have documented many examples of this type of speciation occurring. Darwin's finches are the most famous example. View the model shown. Discuss what kind of geographic barriers would have led to the finch speciątion in the Galapagos.
Transcribed Image Text:Geographic isolation is an isolating mechanism in nature. Over long periods of time, it can lead to speciation. As the name suggests, geographic isolation is when populations of a species become separated geographically. This could also happen from the founder effect, where a small group breaks away from a larger population and establishes a group in an isolated area. Isolation could also occur when a geographic event, like an earthquake or a landslide separates a population. Once the populations are separated evolution can occur through multiple mechanisms. Natural selection could act on each population, where some individuals have favorable traits for survival. Genetic drift can occur, where genotypes become more common due to random chance. These mechanisms can lead to each subpopulation becoming so different, that they can no longer interbreed and are considered separate species. TIME ●00 • ORIGINAL GEOGRAPHIC REPRODUCTIVE SPECIATION POPULATION BARRIER ISOLATION 1. We have documented many examples of this type of speciation occurring. Darwin's finches are the most famous example. View the model shown. Discuss what kind of geographic barriers would have led to the finch speciątion in the Galapagos.
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