Viruses - Recetation - 9-3-07

Viruses - Recetation - 9-3-07 - Steve Suchora 9/4/07...

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Steve Suchora 9/4/07 Biology 220 Recitation - #1 Viruses Viruses Are viruses alive? Why or why not? - No, viruses are not alive for the following reasons: 1.) Cellular organization – All organisms consist of one or more cells. Viruses are not composed of cells; they are merely inert particles until they come into contact with a host cell. 2.) Ordered complexity – All living things are both complex and highly ordered. Many nonliving things may also be complex, but they do not exhibit a high degree of ordered complexity. Viruses are neither complex or highly ordered; they have a very simple structure that includes a nucleic acid genome encased in a protein coat. 3.) Sensitivity – Organisms respond to stimuli. Viruses cannot respond to stimuli outside of a host cell 4.) Growth, development, and reproduction. All organisms are capable of growing and reproducing, and they all possess hereditary molecules that are passed to their offspring, ensuring that the offspring are of the same species. Viruses are neither
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Viruses - Recetation - 9-3-07 - Steve Suchora 9/4/07...

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