SOL Review #1 - (SOL 6

D) long enough for planets to form but not for life to appear. E) too long for life to be able to evolve on their planets. 16. A- and F-type stars probably. A) have lifetimes long enough for planets to form and for simple life to appear, but not long enough for advanced life to develop. B) do not contain enough heavy elements to form planets ................
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