It Is Unlikely That Intelligent Life Would Develop on a Planet

question 60

Multiple Choice

It is unlikely that intelligent life would develop on a planet circling a star of significantly less mass than the Sun because

• A) such a planet would need to be very close to the star and would become tidally locked to the star,making one side of the planet too hot and the other side too cold.
• B) the lifetime of such a star on the main sequence is too short;life forms on such a planet would not have time to evolve to a sufficient level of intelligence.
• C) there would be no region around the star where UV,visible,and IR light intensities would be suitable for the evolution of life.
• D) no moon would form around a planet near such a star,and a moon is considered essential for the evolution of life because of tidal variations on the shorelines of Earth.

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