A positive control is a group in an experiment that receives a treatment with a known result, and therefore should show a particular change during the experiment. It is used to control for unknown variables during the experiment and to give the scientist something to compare with the test group.
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Geologists have sorted earth’s history into different geologic time scale. They just clubbed it into time scales by observing the major changes in the life forms that existed on the earth. Inferring to the fossils found in rocks the time scale was calculated.
First era single cell animals were formed then formed the complex animals.Then Mesozoic era where it is known as the era of dinosaurs. Then the evolution of different species of life during Cenozoic era. These major changes found through fossils helped them to form the GTS.
Gulping... I think this is the stage you are looking for
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Answer:100%
Explanation: The relative humidity is 100 percent when the dew point and the temperature are the same
The narrative and goals for what has become America’s longest war have shifted in the past 16 years, and they may take a new turn Monday night, as President Donald Trump is expected to announce his policy approach for Afghanistan.The war started in October 2001 in the wake of the September 11th attacks, under then-President George W. Bush, and after Obama, Trump is now the second president to inherit -- and have to make a decision on how to handle -- the ongoing conflict.
When Bush first announced the military action on Oct. 7, 2001, he described “strikes against al Qaeda terrorist training camps and military installations of the Taliban regime in Afghanistan.”
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