User:Jaster1

The Doctor explaing morphic fields:

'...And now that I have access to the morphic fields, I can implement a change for the better.' [said Bannen.]

'I hate to act the dumb brunette,' Bernice said, 'but morphic fields?'

'An interesting, but obscure offshoot of biology,' the Doctor said, grasping hold of his lapels and leaning forward in his best lecture-room manner as if nothing else were happening around him, 'first put forward on Earth by a scientist named Sheldrake in the twentieth century. The theory states that all living beings have a field associated with them which defines their entire biology, just as an electric field defines an electron. Humans are the way they are because there's a morphic field for humans, just as there's a morphic field for Alpha Centurians and Arcturans and, Rassilon help us, Daleks, and just as there was one for sparrows and for sheep. Morphic fields are reinforced by every successive generation, so that human babies look the way they do because the human morphic field influences the development of the embryo in the womb.'

'And that is why there are so many humanoid races in the universe. The Gallifreyans evolved first, and thus created a morphic field for humanoids. That made it more probable that the next race to evolve would be humanoid, and that made it much more likely that the next race would be humanoid. The majority of the non-humanoid races developed in environments where two legs, two arms and a head would have been a positive handicap.'

—from Lucifer Rising