Ping!
I suppose you could disassemble a tractor trailer, cut up a few parts and make a bicycle. Two conclusions you could draw from that effort:
1) that the bicycle is the ancestor of the tractor trailer and that given enough time, it would morph into one
2) that both the bicycle and the tractor trailer were designed by something or someone.
Mutations happen, with some adding life enhancing value to lucky recipients.
Most of the time, however, mutations point recipients to extinction.
Thanks for the ping!