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During the 1700s, Carolus Linnaeus classified organisms into the plant and animal kingdoms because at that time:
1. He only had access to plants and animals for study, limiting his classification system to these two kingdoms.
2. The technology available during that period was not advanced enough to identify the unique characteristics of other organisms beyond plants and animals.
3. The concept of bacteria was not fully understood or recognized at that time, further restricting the classification system to just two kingdoms.
These reasons combined to result in Linnaeus establishing a two kingdom system based on the organisms he had access to and the limitations of scientific knowledge and technology during the 18th century.
