Humans, apparently. We seem to be able to manage or disprupt the colonizations of other organisms at will. Other choice - molds.
texas
Bacteria, the most numerous organisms on Earth , are unicellular organisms - just had this question on a homework
sea organisms
Eubacteria are the most common unicellular organisms; they are found everywhere on Earth.
in water
Cyanobacteria is the most ancient group of organisms on this earth.
No. The most abundant organisms are insects. There's more of them than there are people. The most abundant organisms are bacterias.
Dolphins .
All organisms on Earth are carbon based.
The air. Most organisms live in the air! others live in food and on your feet!!
Organs might come in handy. And skin.
Bacteria.