The Manual Autoclave is primarily used by veterinarians or surgeons, but is also used in a range of other settings, including active surgery center, medical practice, dental office, schools, industrial lab, doctor's clinic, or tattoo establishment. Tuttnauer M Series Manual Autoclave Features: Reliable and durable.
Vote for this answer. It is estimated that the first life forms on earth were primitive, one-celled creatures that appeared about 3 billion years ago. That's pretty much all there was for about the next two billion years. Then suddenly those single celled organisms began to evolve into multicellular organisms.
What do you think was the first form of life? It's pretty clear that all the organisms living today, even the simplest ones, are removed from some initial life form by four billion years or so, so one has to imagine that the first forms of life would have been much, much simpler than anything that we see around us.