Answer:
Option A.
Explanation:
Air pressure decreases with increasing altitude.
 
        
             
        
        
        
I think it's B.) Hall of fame
        
             
        
        
        
Answer:
D. An observation is based on evidence, an inference is not.
Explanation:
When you infer something, you're basically guessing at it, while an observation is something that you can see and prove.
 
        
             
        
        
        
converted means changed so it would be A. Not completely sure though.
 
        
             
        
        
        
Aminoacyl-tRNA synthetases recognize their specific amino acid by charge, size and R group and recognize the tRNAs that carry it by the nucleotide sequence .
Aminoacyl-tRNA synthetases are enzymes that attaches the appropriate amino acids on to its tRNA . These are also responsible for performing the first step of protein synthesis.