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## **For extra knowledge** Consider the following examples to identify the taxonomic levels in a hierarchy of categories: ### **Modern Human (Homo sapiens)** | Level | Category | |-------------|---------------------| | Domain | Eukarya | | Kingdom | Animal...

## **For extra knowledge** Consider the following examples to identify the taxonomic levels in a hierarchy of categories: ### **Modern Human (Homo sapiens)** | Level | Category | |-------------|---------------------| | Domain | Eukarya | | Kingdom | Animalia | | Phylum | Chordata | | Class | Mammalia | | Order | Primates | | Family | Hominidae | | Genus | Homo | | Species | Homo sapiens | ### **Coconut tree (Cocos nucifera)** | Level | Category | |-------------|---------------------| | Domain | Eukarya | | Kingdom | Plantae | | Division | Magnoliophyta | | Class | Liliopsida | | Order | Arecales | | Family | Arecaceae | | Genus | Cocos | | Species | Cocos nucifera | ## **Three Domain system of classification** The most appropriate system to classify organisms is the natural classification. Different scientists have introduced different classification methods from past. One of them is the five kingdom classification system introduced by Robert Whittaker in 1969. Modern classification is the classification introduced by Carl Woese in 1990 with three domains. The 3 domains are, 1. Domain Archaea 2. Domain Bacteria 3. Domain Eukarya