Some isotopes, however, decay slowly, and several of these are used as geologic clocks. Dating rocks by these radioactive timekeepers is simple in theory, but the laboratory procedures are complex. <span>All methods rely on the fact that certain elements (particularly uranium and potassium) contain a number of different isotopes whose half-life is exactly known and therefore the relative concentrations of these isotopes within a rock or mineral can measure the age.</span>
        
             
        
        
        
Answer:
The correct option is : c. gas gangrene       
Explanation:
Gas gangrene is a serious bacterial infection caused by the infection of the Clostridium perfringens bacteria. This bacteria is always present in the nature and is a rod-shaped, gram-positive bacteria, that belongs to the Clostridium genus.  
This disease can cause gas production in gangrene, death of the muscle tissues and also sepsis. 
<u>Therefore, Gas gangrene is most associated with the bacteria Clostridium perfringens.</u>
 
        
             
        
        
        
He should ask for spicy tuna rolls that do not have red algae in them. 
        
             
        
        
        
Answer:
When one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released, and ATP is converted to adenosine diphosphate (ADP). Likewise, energy is also released when a phosphate is removed from ADP to form adenosine monophosphate (AMP).
Explanation:
 
        
                    
             
        
        
        
He can make use of an Air Quality Monitor through AirBeam. I no options to chose from so i take it that it isnt a multiple choice question. If im incorrect im sorry