Which of the following is the incorrect statement from the following?
- AIn vertebrates, the notochord is replaced by cartilaginous or bony vertebral column
- BIn cephalochordates, the notochord is extended from head to tail region and is persistent throughout life
- CProtochordates are exclusively marine
- DNotochord is present in tail of adult in urochordata
✓ Correct answer: D
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