Genotype or Phenotype relationships
        
             
        
        
        
Answer:
Explanation: At the molecular level, the universal genetic code and homologous molecules provide evidence of common descent.
 
        
             
        
        
        
Answer:
O proteins
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Answer:
Stars are classified by their spectra (the elements that they absorb) and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M.
Explanation:
O and B stars are uncommon but very bright. M stars are more common but dim. 
 
        
                    
             
        
        
        
Answer:
The Presence of Liquid Water
Explanation: