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well I'll gladly take your pionts.
 
        
                    
             
        
        
        
Answer:
3) they lose energy at a varying rate - is the correct answer.
Radioactive decay is defined as the process by which an unstable atomic nucleus loses its energy by emitting radiations. The decay is random and cannot be predicted earlier.
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effector
Explanation:If the value is not at the set point or is outside the normal range, the control center sends a signal to the effector. The effector is an organ, gland, muscle, or other structure that acts on the signal from the control center to move the variable back toward the set point.
 
        
             
        
        
        
Denaturing. This step occurs at around 95C. This causes the double strand Helix to spectate