Explanation:
Single displacement reaction is defined as the reaction in which more reactive element displaces a less reactive element from its chemical reaction. The reactivity of metal is determined by a series known as reactivity series. The metals lying above in the series are more reactive than the metals which lie below in the series
 
        
             
        
        
        
Answer:
Which statement best describes the relationship between an allele and a gene? An allele is a variation of a gene that can be expressed as a phenotype. New technologies enable oils to be extracted from plants to make renewable biodiesel fuel. 
Explanation:
 
        
             
        
        
        
The total number of species in an area is termed species abundance.
 
        
                    
             
        
        
        
X = 29
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 12 
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x = 2 5 x = 2.416
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 12