Mutations disprove the theory of upward evolution

[Esquilax]

Do you have any evidence whatsoever of anything like that happening?

Yes, actually, though you should amend your post to include the fact that this also takes multiple generations, not just multiple changes. And there's a lot of both of them, that's why it takes millions of years to happen on a noticeable scale.

But, let's take a look: Tiktaalik Rosae, a fish in the process of becoming a land animal. Here's a fun line from the article:

. Jennifer A. Clack, a Cambridge University expert on tetrapod evolution, said of Tiktaalik, "It's one of those things you can point to and say, 'I told you this would exist,' and there it is."

Bam.

Want some more? Here's a list!

Here's a skink from my home of Australia. It's beginning to evolve a live-breeding mechanism, while other members of the same species in other areas still lay eggs. Vivid, vivid proof.

Naked Mole Rats living in different soil compositions have different DNA, reflecting evolutionary changes according to their environment.

Here's eight more examples, just for fun.

Proof enough for you? Will you even read this?

Incidentally, you've changed your story: just a page ago you were arguing that evolution is dogs giving birth to cats. Those were your exact words. Do you have a source for that, or are you dishonestly changing your position once it has become untenable rather than admitting you were wrong?