Is all of land-based life evolved from the same legged fish creature?

Question

So life started in the ocean. Eventually a fish grew legs. I'm pretty sure that prior to that, we had insect-like creatures that lived in the water too which already had legs. So, they came on land and became bugs. But the fish thing....was that single species responsible for all reptiles, mammals, dinosaurs, Larry Kings and birds?

Answer 1

EVOLUTION DOESN'T EXIST

Answer 2

There is no way of knowing that answer short of a time machine and DNA samples, but the answer is probably no.

There is a concept in cladistics (the study of evolutionary relationships) which talks about the most recent common ancestor,but this "ancestor" is really a hypothetical.

Answer 3

more or less, we cant be sure which species it was, but we can make some pretty good assumptions, and for those that say evolution doesnt exist, lets just say I would be blocked from this site for saying the things I feel like saying, just lock your doors!

Anywhoo, I'll add some links with some images and videos, we havent found a fish with legs as such (they all evolved ^_^) but we do have many with muscular appendages which resemble the start of evoltuionary legs

first link - observe that the legs are spindles, this is a provection of the rib cage which would not support the fish out of water howevre;

second link - a mudskipper, notice how its fin acts like a small mis-shapen arm which allows it to move on land to get food that it would otherwise be unable to get (insects, live food=more protein, greater value)

third link - and lastly, my favourite piece of evidence against those people who think evolution is a farce, and for those who say 'its just a fish' go dback and finish high school ya bums! - anyway -

the thing that is fascinating about the coelacanth is that the fins have bones in them, not flimsy ones, but bones that could potantially allow its massive bulk out of the water, obviously this strand did not allow it to do this, but had we not evolved then who knows what would of become of it over the next few millenia, they are now scarce however and when one is found it is worth a h**l of alot to anyone to study this  long lost dead end of the evolutionary chain that could of in fact been us

Answer 4

Pretty much.  A single species can be attributed to several new species over time.  It is not a linear process.