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24 Cards in this Set
- Front
- Back
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what is a theory in science?
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an explanation of a natural phenomenon. it is generally accepted by the scientific community and is supported by a wide variety of evidence.
hypothesis > theory > law |
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what is evidence
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data/information that is observed using the 5 senses
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what is an inference
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a logical/reasonable conclusion based on evidence
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what did jean lamark believe?
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evolution occurs as structures develop through use or disappear through disuse
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was he right? why or why not?
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no his idea was wrong...traits were passed down through genes
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what did alfred russell wallace believe?
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he believed in evolution through natural selection
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why did he not get credit for his theory?
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darwin came up with the idea and Darwin published his theory first
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what is the SIMPLEST theory of evolution?
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a process of change across time from simple to complex
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the SECOND theory of evolution?
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the differences among species are the results of the process of change across time
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the BEST theory of evolution?
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existing life has its origin in pre-existing life and the differences in living types are due to inherited changes that have taken place over time
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what is the mechanism of evolution
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natural selection
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definition of natural selection
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a process by which populations change b/c environmental change leads to favoring some individuals in the population over other individuals, therefore, the individuals that are favored are more likely to survive and pass their characteristics to the next generation
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Overproduction
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organisms have the potentioal to produce more offspring than will survive
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Stability
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overall numbers in the populations tend to remain stable
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Limited Resources
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natural resources such as food, water, and shelter are limited and in a stable environment. They continue to reamin constant
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Infernece A
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thers a struggle for existence among the individuals in a population
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Variation
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no two individuals in a population are exactly the same
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Inheritance
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much of this variation can be inherited
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Inference B
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the struggle for existence puts pressure on the individuals and creates competition
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Inference C
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survival of the fittest
nature favors individuals w/ the characteristics that fit them best to their environment |
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Inference D
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natural selection leads to gradual changes over time and if enough changes occur, new species are produced
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population versus individuals
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evolution acts on populations, rather than invididuals
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microevolution
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evolutionary change within a population that results in modified life forms within a species (microevolution)
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macroevolution
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changes that create new species
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