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Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

This rapid change in species that rarely leaves behind fossil evidence is referred to as