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Viruses: The Borderline Between Living and Non-Living
Viruses occupy a unique position in the biological world, often described as being on the borderline between living and non-living organisms. This is due to their unusual characteristics:
Characteristics of Living Organisms
* Genetic material: Viruses possess DNA or RNA, the blueprints for life.
* Reproduction: They can replicate, but only within a host cell, hijacking its machinery.
* Evolution: Viruses evolve over time, adapting to their environment.
Characteristics of Non-Living Organisms
* Lack of cellular structure: Unlike all other living organisms, viruses are acellular, meaning they lack a cellular structure.
* Inert outside a host: Outside of a host cell, viruses are essentially inactive, unable to carry out metabolic processes.
* Crystallization: Some viruses can be crystallized, a property typically associated with non-living matter.
In essence, viruses exhibit some characteristics of living organisms but lack others. Their dependence on a host cell for replication is a key factor in their classification as borderline entities.
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