Is a planet with a moon thought more likely to evolve life than a planet without a moon?
A) No, there is no reason to believe the existence of a moon has any effect on the evolution of life.
B) Yes. A planet almost certainly must have liquid water to evolve life. A moon will raise tides, which can help to wash minerals into the water, where it can provide a rich mixture conducive to the evolution of life.
C) Yes, a moon can help shield a planet from impacts that could destroy life in its early, formative stages.
D) The gravitational pull of a moon can help a planet establish a rhythmic day/night cycle, which is important for the evolution of life.
Correct Answer:
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