A mass extinction is characterized by the sudden loss of large numbers of plants and animals relative to the number of new species being added.

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This is true. Mass extinctions are defined by a rapid loss of biodiversity, usually occurring over a relatively short period of geological time, and often linked to catastrophic events such as meteorite impacts or volcanic eruptions. The rate of extinction during these periods typically exceeds the rate of speciation (the process by which new species are formed), resulting in a net loss of biodiversity.

A Mass Extinction Is Characterized by the Sudden Loss of Large