Q What distinctive feature did Iguanodon have on its thumbs?
- A Flat, flipper-like bones
- B Sharp spikes resembling ice picks
- C Long, extended suction cups
B Sharp spikes resembling ice picks
The thumbs of Iguanodon were equipped with thick, sharp, spike-like claws.
These spikes are thought to have been used as defensive weapons when attacked by carnivorous dinosaurs, or possibly to help grasp plants and branches.
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