umm... last time I checked Bacteria werent plants.
Did you know bacteria multiply by the millions every second? If they didn't die, or eat the decomposing bio-matter around them, they would litteraly smoother the world in their mass.
Like the Blob
Bacteria eat dead things, they decompose things, they ferment them. Also, another chink in the armor of the argumen.
SOME BACTERIA DONT DIE OF OLD AGE!
Thats right, many kinds of bacteria are essentialy imortal, they don't age, and don't die as a result of age. So how do you account for this?