Here's why:
* Prokaryotes: Bacteria and Archaea are the two domains of life that contain prokaryotic organisms. These organisms lack a nucleus and other membrane-bound organelles.
* Soil, Water, and Humans: Bacteria are incredibly diverse and can be found in virtually every environment on Earth, including soil, water, and even within the bodies of humans and other animals.
While Archaea also include prokaryotes, they are often found in extreme environments like hot springs or highly saline lakes. While some Archaea can be found in the human gut, they are not as widespread as bacteria in those environments.
