alleryIn the subphylum Vertebrata, what replaces the notochord?
AChitinous exoskeleton
BVertebral column
CCalcareous shell
DSpicules
Answer & Solution
Correct answer: B. Vertebral column
1. Vertebrates are defined by a major change to the supporting structure.
2. In them the notochord is replaced by the vertebral column.
3. Rule out chitinous exoskeleton: that is an arthropod feature, not a vertebrate one.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 6 "Animal Classification", p.81_
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