Examlex
In an experiment on the effects of caffeine on the alertness of college students,student volunteers are randomly assigned to two groups.One group is given caffeinated coffee while the other group is given decaffeinated coffee.All participants then play a video game to assess their mental acuity,measured as their final score on the video game.In this study,the group that is given caffeinated coffee is called the:
Age of Fossil
The determination of the time period from which a fossil originates, often through radiometric dating.
Radiometric Dating
A method for determining the age of an object based on the decay rate of radioactive isotopes contained within it.
Measured
Quantified or assessed using specific units or tools, indicating a calculated or carefully determined amount.
Analogous Structures
Features of different species that perform similar functions but have evolved separately, indicating convergent evolution.
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