Amount of wear, and how long they are may contribute with age and maybe even coloration and pigment. 
        
             
        
        
        
<u>Answer:</u>
<em>The dissolved gases produce violent eruption as they escape.
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<u>Explanation:</u>
Magma contains dissolved gases and these dissolved gases induce vapor <em>pressure on the magma.</em> The magma is able to remain in the dissolved state itself without erupting because this vapor pressure is less than the confining pressure of the <em>rock surrounding the magma. </em>
One the vapor pressure exceeds this confining pressure the dissolved gases begin to  expand and<em> forms small gas bubbles</em>.
The <em>density of these gas bubbles</em> called vesicles is less than the density of magma and thus naturally tries to push out. When the gas bubbles escape the magma is also pushed out. Thus greater <em>amount of dissolved gases result in violent eruptions.
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<span>the  molecule that carries the instruction for producing mRN is  DNA</span>
        
                    
             
        
        
        
It depends on the particular ecosystem and why and how it was destroyed. It can take just 2 years or over 100 years depending on the different factors. Sometimes ecosystems never recover.
        
             
        
        
        
Answer:
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