3. 9 0 obj Very few medium-colored moths were seen in either location. Give an example of stabilizing selection using body size of lizards. Occurs when food sources are disperesed, males with ornaments attract more females, results in "fancy" extravagant males, males and females of the same species look different, when a population is separated and can longer exchange genetic information- over time 2 new species can form, 1. evolution of different mating location, mating timing, or mating rituals, the differences between groups which can lead to the formation of a new species, the process where organisms of different species independently evolve similar traits due to adapting to similar environments, instances where 2 or more species affect each other's evolution, random changes in allele frequencies in a population, due to chance, describes allele frequencies changes due to immigration and emigration of individuals to or from a population, All the genes in a interbreeding population, Opposite theory from punctuated equilibrium; Darwin proposed this is how it took so long for evolution to occur, the hypothesis that evolutionary development is marked by isolated episodes of rapid speciation between long periods of no change change. Large, dominant alpha males obtain mates by brute force, while small males can sneak in for furtive copulations with the females in … Disruptive selection - favors both extremes 26. that interfere with learning. Give an example of directional selection using tongue length of anteaters. 12 0 obj Give an example of stabilizing selection using body size of lizards. 11 0 obj %���� 366. In this case, the variance of the trait increases and the population is divided into two distinct groups. endobj Two modes of operation are possible. The slow gradual change in species is called, structures that are similar in related organisms, what evidence do these similar structures provide in support of evolution, what was Lamarck's Theory and why was it incorrect, Lamarck believed that individual's could adapt because they wanted to and that traits that they acquired during their lifetime could be passed on, humans can breed other animals and plants for particular traits, Traits become more or less common depending on an individual's ability to survive and gather resources, who proposed evolution through natural selection, give an example of natural selection in action, Rock Pocket mice- they had light fur but lived on dark lava rocks, a mutation caused a dark fur mouse and it survived better and passed on its genes eventually the population became dark colored because they survived longer, why might one variation have a selective advantage over another variation, allows prey to escape their predators, allows organism to gather food and resources better, allows organism to reproduce better, the organism with the traits for survival will be the fittest, how are natural selection, adaptation, and fitness all interrelated, a population adapts through natural selection because natural selection favors the better adaptations, and organisms with the better adaptations will be the fittest, Spider size- small spiders can not easily get food, large spiders are easily seen and killed, average sized spiders survive the best, natural selection favors both of the extremes of a trait, Limpets color- there are white, tan and dark limpets and they live either one dark or light rocks. endobj endstream Tan limpets do not blend in like tan and dark limpets and therefore will not survive as well, natural selection favors one of the extremes of a trait, Woodpeckers beak length- short and medium sized beaks can't reach as far back into the bark of a tree, so woodpeckers with longer beaks survive better, the process where organisms of different species independently evolve similar traits, insects, birds, and bats have similar flights/wings for flying, The differences between groups which can lead to a new species, structures that are no longer used but may have been used in an ancestor, they may shrink in size, human tailbones, snakes with femurs, human appendix, what are the major driving forces behind evolution, Natural selection, mutations, gene flow, genetic drift, according to evolutionists which major driving force of evolution contributes to the most genetic variation in a organism, the formation of a new species through evolution, What species of animals did darwin focus a lot of his attention on in the Galapagos, Since finches went through adaptive radiation, what type of evolution was represented by these animals, the process by which organisms diversify rapidly into a multitude of new forms, Explain how homologous structures support the idea of adaptive radiation. 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