[Heartlander]

I did not say random (although mutation is random WRT fitness) - I said evolution cannot have a goal – is unguided and blind. What’s up with the song and dance routine?

[JimSEA]

There is a reason why evolution occurs, it is guided by the environment and survivability. Thus, it's not random and unguided. Mutations are random but their persistence in the organism isn't random. Most mutations are decidedly unhelpful or fatal and are out of the sets of alleles and are not heritable. It is an article of faith among creationists and intelligent design believers that evolution is all chaos and random chance which is simply not true.

Also, when I want to illustrate something I often search YouTube to find the explanation I'm looking for. Here is an article from New Scientist on the flagellum or rather a whole range of such appendages..