We have 20 different amino acids in our bodies.
        
             
        
        
        
They are changed because of the environments changing
        
             
        
        
        
Answer:
Soil taxonomy is the system of soil classification used for mapping and classifying soils by the National Cooperative Soil Survey in the United States; it is used in many other countries as well. ... It employs a unique mnemonic system based on Greek, Latin, or other root words for assigning names to taxonomic classes