Which Phylum classification signifies that whiptails are connected to vertebrates because they possess a notochord at some developmental stage?
Answer
Chordata
The classification of whiptails places them within the Phylum Chordata. This classification is significant because it denotes a fundamental characteristic shared by this group, which includes all vertebrates: the presence of a notochord at some point during their life cycle, even if it is later replaced by a vertebral column. Membership in Chordata places them on the evolutionary path leading toward vertebrates, which is further supported by their Class placement as Reptilia. This designation distinguishes them fundamentally from invertebrate phyla like Arthropoda or Echinodermata.
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