'Key concept viruses' diaporamas de présentation

KEY CONCEPT Infections can be caused in several ways.

KEY CONCEPT Infections can be caused in several ways. Viruses, bacteria, viroids, and prions can all cause infection. Any disease-causing agent is called a pathogen. . 1 nanometer (nm) = one billionth of a meter. 100 nm. eukaryotics cells 10,000-100,000 nm. viroids 5-150 nm.

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