What characteristic defines the Phylum Chordata for Tyrannus verticalis?

Answer

Having a notochord at some stage of development

The Phylum Chordata is characterized by the presence of a notochord during some part of the organism's life cycle. In vertebrates, like the Western Kingbird, this structure provides primary support during early development and eventually evolves into the backbone or spinal column. This anatomical feature is a core requirement for placement within this diverse phylum, which encompasses all vertebrates.

What characteristic defines the Phylum Chordata for Tyrannus verticalis?
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