thatonesmartkid thatonesmartkid

22-11-2016
Physics

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Martian surface features include gullies and runoff channels, which suggest that _______ on the surface of Mars. A. there is life B. plants could grow C. humans can live D. liquid water once existed

Respuesta :

22-11-2016

Those are features that are carved out by running water.
So even though they're empty now, their presence suggests
that liquid water once ran there.

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