Phylum
Group of closely related classes
The phylum is a taxonomic rank that groups together organisms with similar characteristics and evolutionary relationships. It is the third level of classification in the Linnaean system of classification, below kingdom and above class. In total, there are around 35 different phyla recognized in the animal kingdom, while other kingdoms such as plants and fungi have their own unique phyla.
Each phylum includes organisms that share a specific set of traits or characteristics that distinguish them from other organisms. For example, all animals in the phylum Chordata have a notochord, hollow dorsal nerve cord, pharyngeal pouches, and a post-anal tail at some point in their lives. These characteristics are unique to this phylum and help to define the traits and features of the organisms that belong to it.
In summary, the phylum is a taxonomic rank that groups organisms with similar characteristics and evolutionary relationships, and helps to organize the diversity of life on Earth.
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