In the section "Investigating Life:E. T. and the Origin of Life," how did the scientists determine if the organic molecules in the meteorite were extraterrestrial?
A) By identifying a decrease in 13C and 15N in the meteorite compared to terrestrial measurements
B) By measuring the amount of amino acids in the meteorite
C) by measuring the amount of nucleotides in the meteorite
D) By identifying an increase in 13C and 15N in the meteorite compared to terrestrial measurements
E) By measuring the total amount of carbon and nitrogen in the meteorite
Correct Answer:
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