VIRUS EVOLUTION A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea. November 24, 2017 Ecology, Education, Environment, Health Share This Video Tweet Share Share Email Related Videos These Rare Giraffes Were Killed Just for Their Tails (Exclusive Video) | National Geographic Animal, Ecology, Human These Rare Giraffes Were Killed Just for Their Tails (Exclusive Video) | National Geographic Why North Dakota’s oil fields are so deadly for workers Health, Human, Lifestyle Why North Dakota’s oil fields are so deadly for workers Urban Barns | Farming of the future Ecology, Environment, Technology Urban Barns | Farming of the future
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