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We're glad you're visiting our
bacterial info resource. At bacterial info you will
find great resources, articles, links and more about
bacteria.
Bacteria (singular: bacterium) are
unicellular microorganisms. Typically a few micrometres
in length, bacteria have a wide range of shapes, ranging
from spheres to rods to spirals.
Bacteria are ubiquitous in every habitat on Earth,
growing in soil, acidic hot springs, radioactive waste,
seawater, and deep in the Earth's crust.
There are typically 40 million bacterial cells in a gram
of soil and a million bacterial cells in a milliliter of
fresh water; in all, there are approximately five nonillion
(5×1030) bacteria on Earth, forming much of the
world's biomass. Bacteria are vital in recycling nutrients,
and many important steps in nutrient cycles depend on
bacteria, such as the fixation of nitrogen from the
atmosphere.
However, most of these bacteria have not been
characterized, and only about half of the phyla of bacteria
have species that can be cultured in the laboratory. The
study of bacteria is known as bacteriology, a branch of
microbiology.
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