In the Drake equation (Number of Civilizations = NHP × flife × fciv × fnow), we expect the term fciv to be small if
A. most civilizations destroy themselves within just a few hundred years of arising.
B. most of the civilizations that have ever existed are still out and about in the galaxy.
C. primitive life is common but intelligent life is rare.
D. most habitable planets never actually get life on them.
Answer:C
In the Drake equation (Number of Civilizations = NHP × flife × fciv × fnow), we expect the term fciv to be small if
A. most civilizations destroy themselves within just a few hundred years of arising. B. most of the civilizations that have ever existed are still out and about in the galaxy. C. primitive life is common but intelligent life is rare. D. most habitable planets never actually get life on them.