CUIZ-FACT-20C436CD
hard
Animals
✓ Fact-Verified
To which biological phylum do all mammals, birds and reptiles belong?
Verified Answer
Annelida
Quiz Options
- Annelida
- Chordata
- Placazoa
- Echinodermata
Explanation & Context
These animals belong to the phylum Chordata because they possess a notochord or spinal cord at some stage of their development. This group encompasses all vertebrates, as well as several closely related invertebrate lineages.
Authoritative Sources & Citations
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