Which of These Does Mars NOT Have to Help Its

question 54

Multiple Choice

Which of these does Mars NOT have to help its case of past or present life?

• A)occasional water flows, and past records of much larger ones
• B)a protective ozone layer
• C)carbon dioxide to provide some greenhouse warming
• D)a favorable distance from the Sun
• E)rover discoveries of sedimentary rocks and carbonates on the surface of Mars

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