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24 Cards in this Set

  • Front
  • Back
what is a theory in science?
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
what is evidence
data/information that is observed using the 5 senses
what is an inference
a logical/reasonable conclusion based on evidence
what did jean lamark believe?
evolution occurs as structures develop through use or disappear through disuse
was he right? why or why not?
no his idea was wrong...traits were passed down through genes
what did alfred russell wallace believe?
he believed in evolution through natural selection
why did he not get credit for his theory?
darwin came up with the idea and Darwin published his theory first
what is the SIMPLEST theory of evolution?
a process of change across time from simple to complex
the SECOND theory of evolution?
the differences among species are the results of the process of change across time
the BEST theory of evolution?
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
what is the mechanism of evolution
natural selection
definition of natural selection
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
organisms have the potentioal to produce more offspring than will survive
overall numbers in the populations tend to remain stable
Limited Resources
natural resources such as food, water, and shelter are limited and in a stable environment. They continue to reamin constant
Infernece A
thers a struggle for existence among the individuals in a population
no two individuals in a population are exactly the same
much of this variation can be inherited
Inference B
the struggle for existence puts pressure on the individuals and creates competition
Inference C
survival of the fittest
nature favors individuals w/ the characteristics that fit them best to their environment
Inference D
natural selection leads to gradual changes over time and if enough changes occur, new species are produced
population versus individuals
evolution acts on populations, rather than invididuals
evolutionary change within a population that results in modified life forms within a species (microevolution)
changes that create new species