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killian killian
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10 years ago
When we analyze whether a world is a possible home to life, the key thing we look for is ________.
A) the past or present existence of liquid water
B) evidence of atmospheric oxygen
C) the presence of organic molecules such as amino acids
D) surface coloration changes that could indicate vegetative growth
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padrepadre
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10 years ago
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killian Author
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10 years ago
Thank you.
Smiling Face with Open Mouth
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3 years ago
thank you
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