Radiation dating game

09-Dec-2017 15:01

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Once multicellular organisation became possible as atmospheric oxygen levels rose, the early multicellular organisms rapidly diverged into many adaptive forms.

Mass extinction events and an organism's unique adaptations mark the history of evolution, both of which may lead to adaptive radiation.

[2] Natural selection, gene flow and random genetic drift (the random change in gene combinations with each generation) drive evolution, resulting in a change in gene frequencies within populations .

[3] Adaptation is genetically based and so leads to phenotypic changes that accumulate over time; [4] Speciation (species formation) evolves through reproductive isolation and (genetic) divergence of populations; [5] Genetic changes through natural selection lead to new species and eventually new taxa .

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Adaptation is a continuous response to the environment by changeable species.

Scientists now have accurate methods (see below ) for dating fossils.

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