Answer:
Explanation:
"Which three components are common to all amino acids? The key elements of an amino acid are carbon (C), hydrogen (H), oxygen (O), and nitrogen (N), although other elements are found in the side chains of certain amino acids."
 
        
             
        
        
        
Answer:
B. Fossil
Explanation:
 According to National Geographic, "Fossils are the preserved remains, or traces of remains, of ancient organisms." When you find the impression of a leaf, the leaf imprint is the preserved remains of the leaf. 
 
        
                    
             
        
        
        
Answer:
Mental process is a term used for the things that an individual can do with their minds; perception, memory, thinking, volition, and emotion. Cognitive function is sometimes used instead.
 
        
             
        
        
        
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Answer:
tectonic cycles 
Explanation:
the house in question was