What Phylum classification denotes O. virginianus possesses a backbone?
Answer
Chordata
The placement of *Odocoileus virginianus* in the Phylum Chordata signifies that, like all vertebrates, it possesses a notochord at some stage of its development, which subsequently develops into a vertebral column or backbone. This phylum encompasses a vast array of complex animals characterized by this fundamental structural feature. While Animalia is the broader Kingdom defining it as multicellular and heterotrophic, and Mammalia defines its warm-blooded, furred nature, Chordata specifically identifies the presence of this defining axial skeletal element, the backbone, which is central to its complex physiology.
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