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Home Q & A Board Science-Related Homework Help Physics Astronomy
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adreamer adreamer
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7 years ago
Isotopic evidence for the presence significant quantities of liquid water on Mars in the past comes from the observation of
A) an elevated ratio of deuterium to hydrogen
B) an elevated ratio of hydrogen to deuterium
C) a complete absence of hydrogen in the atmosphere
D) a complete absence of deuterium in the atmosphere
Textbook 
Life in the Universe

Life in the Universe


Edition: 4th
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19Clyde19Clyde
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adreamer Author
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6 years ago
Thanks!
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