In some chordates , the notochord is modified as the vertebral column and such animals are called vertebrates . Which of the following make sense ?
All chordates are vertebrates but all vertebrates are not chordates
All vertebrates are chordates and all chordates are vertebrates
All vertebrates are chordates but all chordates are not vertebrates
Chordates are not vertebrates and vertebrates are not chordates
As we have learned
Subphylum Vertebrata / Craniata -
Notochord is present during embryonic period and is replaced by cartilaginous or body Vertebral Column in adults.
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