It has one less electrons then protons
 
        
             
        
        
        
The answer is the nervous system. 
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Answer:
A. to remove waste
Explanation:
The purpose of reproduction is to create offspring.  Offspring will naturally carry the characteristics of the parents.  When offspring are born they create the next generation and keep a species alive.  The excretory system removes waste.
 
        
                    
             
        
        
        
Answer:
Through the study of meteorites, their chemical composition of silicates—material made of silicon and oxygen. Others contain metal—nickel and iron. Knowing what the meteorite was composed of lets you know where it came from. Chondrites are composed of hardened lava - this is occurred at the beginning of the solar system (4.5 mya). Carbonaceous chondrites contain carbon and water which formed away from the sun. 
Explanation: