The PNS helps to maintain internal balance, or "homeostasis," by the Parasympathetic division of the Autonomic Nervous System (ANS). Sometimes referred to as the "rest and digest" system, the Parasympathetics keep our internal activities regular throughout the day and night, such as a steady heart rate, slow breathing, digestion of food, filtration of blood, and excretion of wastes.
        
             
        
        
        
A Enzymes read the DNA code and build a new DNA molecule from scratch
        
             
        
        
        
Contents of the model cell will change color.
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Your answer would be $4 times $y.
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Answer:
D
Explanation:
Everything in there pollutes the environment.