Bacteria cell

Discovery Science: Earth – Bacteria – Harmful and Useful Bacteria

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Earth Science: Bacteria – Harmful and Useful Bacteria Most people think of bacteria as pathogens carrying diseases such as tuberculosis or the plague. Contrary to this common belief, many of these tiny organisms are very useful to humans. Bacteria play an important role in a bio- logical ecosystem. In many ways, they are responsible for … Read more

Discovery Science: Earth – Microorganisms – Structure and Metabolism of Bacteria

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Earth Science: Microorganisms – Bacteria Bacteria are cellular organisms without a nucleus from the group prokaryotes. Prokaryotic cells are much smaller compared to eukaryotic cells, which contain a nucleus and several chromosomes. Bacteria are so tiny that they are invisible to the human eye, yet they can significantly impact the environment and lifestyle of other … Read more