It is possible that a common anscestor caused phi but highly unlikely especially considering how varried the species that contain phi are. Also a common biological ascestor doesn't explain the use in non-biological systems. Look how often it comes up in our own solar system
http://goldennumber.net/solarsys.htm. Especially interesting is how close phi is to the mean of the planets orbital distance compared to the planet closer than it. Common ansestory doesn't explain why it doesn't only turn up in physical aspects of life but also in behavioral aspects, ala reproduction, what is attractive, ect. People whose body more closely resembles phi are considered more attractive. TLC had a special on this exact topic where they measured lots of supermodels.
And since when do hurricanes/galaxies/planets have a mind which tells them to do what is the most effiecient?