Start with one kind of bacterium. Create some strong selection pressures on it and pretty soon you have two kinds. Something that eats nylon, maybe. So, no big deal there. It happens by itself.
Also, the fact is that it is far more probable for cellular life to mutate itself into extinction rather than become supposedly higher forms of life.
Do you consider yourself a cellular life form? Chances are you have three or so mutations not present in either of your parents. They are novel and unique to you but you didn't die.
Furthermore, while bacteria can get genetic material (from other bacteria), similar processes haven't been shown in any multi-cellular organism.
Every organism has some means of acquiring genetic variation, even those that reproduce by budding. That said, prokaryote (big cells with nuclei) budders evolve slowly compared to sexual reproducers because sexual recombination creates more variation faster.
Rather than being considered evolution, the gene swapping could be considered a form of mating (without production of immediate offspring) in that there is a mixing of genetic material. bye again.
Bacterial conjugation is not an important mechanism of evolution in non-bacteria. You are evidently misreading some paragraph in some linked material somewhere beyond all intent or proportion.
You also have a funny idea of what the word "bye" means, but I don't mind helping you educate yourself.
This is untrue in every possible sense.
Multicelled organisms get additional genetic material from viral insertion, from gene duplications, and from chromosome duplications. All of these processes have been observed.