Final answer:
The kingdom not included in Linnaeus’s original taxonomy is Fungi. Linnaeus originally classified life into two kingdoms: Animalia and Plantae. Protista was introduced later by Ernst Haeckel and others, with Fungi eventually recognized as a separate kingdom due to its unique characteristics.
Step-by-step explanation:
The kingdom that was not a part of Linnaeus’s taxonomy is Fungi. Linnaeus’s original classification system included only two kingdoms: Animalia for animals and Plantae for plants. Later on, other kingdoms were recognized, including Protista by Ernst Haeckel and Monera for unicellular organisms without nuclei. However, the recognition of Fungi as a separate kingdom occurred after Linnaeus's time, which included organisms that differ significantly from plants and animals.
According to Linnaeus's classification system, a bear would belong to the kingdom Animalia, as it is a multicellular organism that attains energy through ingesting other organisms. This kingdom encompasses a diverse array of living creatures from humans to insects, all of which are heterotrophic.
The Protista kingdom, on the other hand, includes organisms that are eukaryotic but do not fit into the other kingdoms of Plantae, Animalia, or Fungi. Protists are a diverse group, including both unicellular organisms like algae and plankton and multicellular ones like giant seaweeds.