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zhaneq14 t1_iu7uas4 wrote

The animal would not be constantly dropping trackable scent that would lead predators to follow him. If the animal is a predator, it would constantly be dropping scent that would warn prey that it is nearby.

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ipatimo t1_iu82sly wrote

Also they need something to intentionally mark their territory.

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waptaff t1_iu87izl wrote

Also it is useful as a water reservoir. For instance, reptiles that live in the desert tend to have large bladders.

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