Diseases caused by viruses and bacteria

Discovery Science: Earth – Microorganisms – The Virus

by

Earth Science: Microorganisms – The Virus Viruses are tiny infectious parasites that lack their own metabolism. Therefore, viruses depend on host cells to reproduce and proliferate. Normally, viruses are strictly host-specific and affect either eukaryotes (organism with nucleus) or prokaryotes. Several viruses cause dangerous diseases, many remaining without a cure. Earth Science: Biology – Microorganisms … Read more

Discovery Science: Earth – Bacteria – Harmful and Useful Bacteria

by

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