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Viruses have no self metabolism nor ability to reproduce autonomously, but bacteria can reproduce, grow and metabolise without the help of another cell. An easy way to think about it is this: If all...
Viruses lack some features that are considered typical of living beings. While they can reproduce, they don't move, they have no metabolism, and their reproduction is carried out by the host cell,...
fire is considered alive because it needs oxygen to burn. flowers are alive because it needs heat for energy to create more cells, CO2 because they need it to produce necessary sugars. and it...