Bacteria and multicellular organisms are estimated to have evolved around 3 and 3.5 billion years ago. Cyanobacteria-like organisms seem to be the first evolutions into multicellular organisms.
There are several vaccines to prevent bacterial infections, but not nearly as many as there are for viral infections. One widely used today is the vaccine for bacterial pneumonia which has been very effective in reducing death from this infection in the elderly. Other frequently used vaccines for bacterial diseases include those for: meningitis, cholera, salmonella, anthrax, plague, Hib, and tuberculosis.
No, living things cannot be found in the asthenosphere. The asthenosphere is a region of the Earth's mantle that consists of hot, solid rock that is capable of flowing over long periods of time. Conditions in the asthenosphere are too extreme to support life.
Carbon is the element found in all living things and can form long chained molecules due to its ability to bond with other carbon atoms and various elements.
Bacterial food contaminations runs a long gamut. From E.Coli, Salmonella, and many more. I found you a link that you might be interested in to get more information http://aggie-horticulture.tamu.edu/extension/poison.html
Bacteria is considered primitive because it has about the most simple structure of all living things. It isn't quite a simple as a virus (which is not considered life, but is called non-life), but it is an "independent organism" that can do all the basic things a living organism can do. And bacteria, because of its primitive structure, is though by those who subscribe to evolution as one of the earliest (most primitive) forms of life. Bacteria has been on earth a long, long time, and it is an elegantly simple living thing. That's the long and short of it. Wikipedia has an excellent post on bacteria. You'll find a link to the article below.
Yes, "How long have you been living in Oxford?" is a good sentence.
about 10,000 years
The Earth has been habitable for living organisms for about 3.5 billion years.
a long time
Myrtle and Wilson have been living over the garage for two years.
10 years
years :D
They Have Been Around Since The Dinosaurs Were Living
for over 200 years
at least 2 years
10 years
18 million