Biology is the study of living things and all living things are on the tree of life.
Viruses are not on the tree of life because they are not alive (I realize this is debatable). So are viruses the only non-living entity studied in biology, the field of living things?
Any help would be greatly appreciated.
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There are also prions. Misfolded proteins that can mess up tissue around them. You can’t kill them, cook them out, poison them. They can also remain in tissue that was preserved years prior.
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