This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.

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Here are the answers to question 3:
a) • A: Thoracic vertebra • B: Lumbar vertebra • C: Sacrum • D: Vertebral column
b) Bone D (Vertebral column) belongs to the Axial skeleton.
c) • X: Cervical vertebrae • Y: Thoracic vertebrae • Z: Lumbar vertebrae • W: Sacrum • V: Coccyx
d) • X (Cervical vertebrae): 7 bones • Y (Thoracic vertebrae): 12 bones • Z (Lumbar vertebrae): 5 bones • W (Sacrum): 1 bone (fused from 5 vertebrae) • V (Coccyx): 1 bone (fused from 3-5 vertebrae)
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a) • A: Thoracic vertebra • B: Lumbar vertebra • C: Sacrum • D: Vertebral column b) Bone D (Vertebral column) belongs to the Axial skeleton.
This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.