Peg-like teeth

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Q1: What are peg-shaped teeth useful for?

[Answer]

This dinosaur does not have pointed teeth. Its teeth are like pegs with flat ends.

The dinosaur on the previous screen had pointed teeth, so this dinosaur must eat in a very different way.

Pointed teeth are good for ripping off lumps of flesh. Pegs are good for stripping leaves from branches.

So we know that this dinosaur was a plant-eater, while the one with pointed teeth must have been a meat eater.