Two kingdoms that are common to all biological classifications

Options

A. Monera and Plantae
B. Plantae and Animalia
C. Protists and Monera
D. Animalia and Fungi

Answer

**Step-by-Step Solution:**

1. **Understanding Biological Classification**: Biological classification is a system used to categorize living organisms based on shared characteristics. This system has evolved over time, leading to various classification schemes.

2. **Historical Context**: The first significant classification system was proposed by Aristotle, who categorized organisms into two broad groups: plants and animals.

3. **Linnaeus' Contribution**: The modern system of classification was further developed by Carl Linnaeus in the 18th century. He is known for formalizing the binomial nomenclature and classifying organisms into two main kingdoms.

4. **Identifying the Two Kingdoms**: According to Linnaeus, the two kingdoms he proposed were:
- **Plantae**: This kingdom includes all types of plants, ranging from simple mosses to complex flowering plants.
- **Animalia**: This kingdom encompasses all animals, from simple invertebrates to complex mammals.

5. **Conclusion**: The two kingdoms that are common to all biological classifications, especially in the early classification systems, are Plantae and Animalia.

**Final Answer**: The two kingdoms that are common to all biological classifications are Plantae and Animalia.

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