Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. ... The binding of a substrate to an enzyme active site is termed the "enzyme-substrate complex.
        
             
        
        
        
Answer:
The key geographic questions ask Where is it located? Why is it there? What is the significance of the location? As students pose additional questions, they seek responses that help to organize spatial understandings: What is this place like?
 
        
                    
             
        
        
        
1. medieval  - relating to a time in European history from about 500 to 1500 A.D.
2. Norse  - relating to Scandinavia and its people
3. legacy  - anything that is handed down from one generation to the next
4. migration  - the act of moving from one place to another
5. Gupta  - an empire that lasted about three hundred years in India
6. Tang  - Chinese dynasty lasting about three hundred years
 
        
                    
             
        
        
        
Is Trujillo one of the choices? That'd be the original.