Biology

Biology, 12.07.2019 14:40, jello2612

Gradual changes in the frequency of diseases over long periods are known as

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Biology, 24.07.2019 15:30, brenyasanders4001

Charles darwin understood that evolution was a slow and gradual process. by gradual, darwin inferred a "stepwise" process with a species evolving and accumulating small variations over long periods of time until a new species was born. if evolution is gradual, there should be a fossilized record of small, incremental changes on the way to a new species. but in many cases, scientists were unable to find these intermediate forms. in 1972, evolutionary scientists stephen jay gould and niles eldredge proposed another idea of evolution. they suggested that species are generally stable, changing little for millions of years. this stable species becomes the victim of a rapid burst of change that results in a new species and that leaves few fossils behind. gould and eldredge proposed this new theory called

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Biology, 27.07.2019 15:00, rodneisha1313

Which of these describes punctuated equilibrium? a. rapid periods of speciation over a long time b. long periods of no speciation interspersed with short bursts of speciation c. gradual changes over a short period of time d. periods of medium speciation followed by periods of rapid speciation

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Geography, 10.10.2019 17:10, eliezer25

The limitations of environmental epidemiology include the fact that? a) accurate assessment of exposure is difficult b) environmentally associated diseases often have low incidence and prevalence c) long latency periods often occur between initial exposures and diseases outcomes d) the effects of exposures are often nonspecific e) all of the above

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Biology, 27.10.2019 09:43, morgan3346

The traditional, darwinian view of evolution was that of: slow, gradual change over long periods of time moderate changes over long periods of time fast, rapid changes in a short amount of time species do not change

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