WebThese include bacteria and fungi, but individual viruses are too small to see with an ordinary microscope. Bacteria are roughly 20-times smaller than human cells, while viruses are … WebViruses, do, however, share a few features: First, they generally are quite small, with a diameter of less than 200 nanometers (nm). Second, they can replicate only within a host cell. Third,...

Are viruses dead or alive? (article) Khan Academy

WebMar 7, 2024 · Viruses do not have cells. They have a protein coat that protects their genetic material (either DNA or RNA). But they do not have a cell membrane or other organelles (for example, ribosomes or … WebVirus classification is based mainly on characteristics of the viral particles, including the capsidshape, the type of nucleic acid (DNA or RNA, double stranded (ds) or single stranded (ss)) within the capsid, the process of replication, their host organisms, or the type of disease they cause. iowa hawkeye football how to watch

How do viruses compare with organisms? A. - Brainly

WebEssentially, a virus consists of proteins and genetic material—either DNA or RNA, but never both—that are inert outside of a host organism. However, by incorporating themselves … WebMar 13, 2024 · When a virion attaches to a suitable host cell – this depends on the protein molecules on the surfaces of the virion and the cell – it is able to penetrate the cell. Once inside, the virus ... WebJul 23, 2014 · Colds can be caused by more than 200 different viruses. The flu, however, is only caused by three virus types: influenza A, B, and C. Symptoms that include a scratchy throat and stuffy nose come on much more slowly for the cold than the flu. With the flu, symptoms are more severe and also usually include fever and chills. iowa hawkeye football highlights today