The endoplasmic Reticulum is like an assembly line: The workers on the assembly line do their work, as the products move through the assembly line. Similar to the workers are the ribosomes on the reticulum, as they also do their work in a line. In the reticulum, like in a factory line, the proteins are produced, and like in the case of the facotry line, they are later sent to the other place in the factory or cell. 
        
             
        
        
        
An exothermic reaction<span> is a chemical </span>reaction<span> that releases energy by light or heat. It is the opposite of an </span>endothermic reaction<span>. Expressed in a chemical equation: reactants → products + energy.</span>
        
                    
             
        
        
        
C. often because t<span>here are three major types of </span>plate<span> boundaries. If </span>two<span> tectonic </span>plates<span> collide, they form a convergent </span>plate<span> boundary. Usually, one of the converging </span>plates<span> will move beneath the other, which is known as subduction. Deep trenches are often formed where tectonic </span>plates<span> are being subducted and earthquakes are common</span>