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Because a desert is an arid climate with intense heat that lizards need to survive. They are cold blooded and need the terrain they live in to regulate their body temperature rather than regulate it themselves like mammals. The fact that their skin is scaly and rough helps as well because with skin like that you do not lose any moisture like other creatures, so they can go long periods of time without water, not unlike the cactus with thorns and big hollow like leaves that trap water and hold moisture for extended periods of time because obviously in a desert is does not rain all that often.

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14y ago

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