Answer: By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.
Explanation:
 
        
             
        
        
        
Answer:
depending on conditions !
Explanation:
e.g a peat bog or somewhere like the north pole vs a humid jungle or hot desert 
things to consider
air composition in the environment to feed microbes 
temperature to speed up reactions 
any natural catalysts 
PH of your environment
 
        
             
        
        
        
<span>I suggest dialysis to the patient. Dialysis is a medicine. People who failed with the kidneys may have difficulty eliminating waste and unwanted water from the blood. Dialysis is an artificial way of carrying out this process. Dialysis substitutes the natural work of the kidneys.</span>
        
             
        
        
        
cardiac muscle require lot of energy to perform while skeletal muscle are used in coordinate of bone moments so they require less energy since mitochondria is powerhouse cell so it is highly concentrated in cardiac muscle...
 
        
             
        
        
        
The lower the fossil the older it is. 
So, if two fossils were in different layers of sedimentary rock, the lowest fossil is older.