The correct answer is dermal bone plates.
The turtle carapace or shell comprises the dermal bone plates attached to the spine along with the expanded ribs.
- The turtle shell, also known as the turtle carapace, is the bulged-out (convex) upper part of the turtle shell structure where the dermal bone plates are attached by ossification with the spine along with the expanding ribs.
- Due to this characteristic feature, turtles differ from other reptiles based on this carapace.
- This fused spinal cord and modified ribs with dermal bone support the carapace or shell of the turtle.
- The shell protects the turtle's internal organs, absent in any other reptile.
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