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The answer would be A, an electron is found outside of the nucleus.
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Rex is not a Tyrannosaurus rex because each of his hands has three fingers. Tyrannosaurus had only two fingers on each hand.
The excretory system allows animals to remove metabolic waste their bodies. Many of these substances are potentially toxic. in Mammals nitrogenous toxins like urea are expelled through liquid urine while in reptiles and birds the nitrogenous compounds are expelled as a solid. This allows birds and reptiles to use less water in the processes of metabolism.
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The "normal" of the body. Temperature, blood sugar, etc.
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