Question

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Difference between Micro-organisms and Viruses!? Is protozoa(protozan) microbe or virus?

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Answer 1

Most microbes are unicellular and small enough that they require artificial magnification to be seen. However, there are some unicellular microbes that are visible to the naked eye, and some multicellular organisms that are microscopic. An object must measure about 100 micrometers (µm) to be visible without a microscope, but most microorganisms are many times smaller than that. For some perspective, consider that a typical animal cell measures roughly 10 µm across but is still microscopic. Bacterial cells are typically about 1 µm, and viruses can be 10 times smaller than bacteria (Figure 1). See Table 1 for units of length used in microbiology.

Answer 2

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Viruses are microscopic organisms, generally very smaller than bacteria. They are parasitic in nature, i.e. they can thrive and reproduce only on the host cell like animals, bacteria and plants etc.

Viruses are non-living in nature until they come in contact with the living cells. Most of the viruses are infectious in nature. Whereas some of the other microorganisms are useful in nature.Viruses can multiply very rapidly than the microorganisms.

Protozoa is a microbe not a virus.

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