Animal and Plant Health Inspection Service (APHIS)
        
             
        
        
        
there could be harmful chemicals
 
        
             
        
        
        
The Chloroplast possess their own DNA. This organelle has green orpiment called Chlorophyll. 
        
             
        
        
        
What is the main source of downward convection<span> flow in the mantle called? The downward sliding characteristic of ridge-push is the result of what? </span>What causes<span> the </span>thermal convection that drives plate motion<span>? Is it the downward arm of convective flow in the mantle?
Here's your answer...
</span>The heat driving<span> mantle </span>convection<span> has three sources. "Primordial" </span>heat<span> (left over from the accretion and differentiation that led to the formation of Earth's core) contributes 20 to 50% of the </span>heat<span>. ... Mantle </span>convection<span> is the main mechanism by which this </span>heat<span> escapes from the interior of Earth.
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Hope this helped