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Simple animals arise from raw meat, piles of rags, or fruit
Larger female frogs reproduce more often and produce more offspring causing a shift average female body size in the population |
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One extreme phenotype is more successful in the environment
Disproved by Louis Pasteur in 1862 |
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Selection that occurs between two males within a population
Humans create different levels of hemoglobin at different elevations |
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Natural Selection: Individuals don't change but instead there's a change in population allele frequency due to variation of individuals
Poodles have been bred to be hypoallergenic for humans with allergies |
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Inheritance of Acquired Characteristics: Individuals pass on the phenotypic changes acquired during their life
Intermediate sized male fish are unable to defend space for breeding like the large males and unable to "sneak fertilize" like the smaller male fish |
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Model for natural selection in which humans choose what variations are "fit"
Male birds of paradise have bright colors that help to attract a female within the population |
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Both extreme phenotypes have higher fitness than the average phenotype
Rabbits that turn white more quickly than other rabbits in the population will be more likely to survive and reproduce, thus passing on this "quick changing" variation to their offspring |
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Selection that occurs between males and females in a population
Mountain goats compete with head butting for breeding rights with the females in the population |
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Increased rates of darker phenotype in a population of moths
Both low and high birth weights in human babies have increased death rates |
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Two different environments will lead to two different phenotypes in the same genotype
During the industrial revolution darker moths became more frequent in the population due to increased predation of lighter colored moths on dirty trees |
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The average phenotype is more successful in the environment
Parent giraffes that were able to stretch their necks the longest will be more likely to reproduce and will pass this longer stretched neck onto their offspring |
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