Answer:
D. 
Explanation:
That is where it demonstrates how the word is said. it's easy to identify this because the pronunciation always comes right after the word itself in the definition.
 
        
                    
             
        
        
        
In many different places to find them. Like pancreas, ovaries, testes, thyroid, parathyroid, hypothalamus, and neuro-endocrine organs.<span>
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three weak hydrogen bonds are between guanine and cytosine bonds</span>
        
             
        
        
        
Because they are smarter then plants
        
             
        
        
        
Answer:
1) Aa refers to the heterozygous of the genes. In this gene, both allele are different from one another. 
2) AA is a gene which is homozygous in nature. Homozygous means that both allele are the same. Capital letters i. e. AA is used for the trait that is dominant. 
3) aa is a gene which is homozygous in nature. Lower case letters i. e. aa is refer for the trait that is recessive.