Answer:
Enzyme catalase is affected by high temperatures
Explanation:
Enzymes are organic catalysts which are protein in nature therefore they are sensitive to changes in temperature. Most enzymes have an optimum range of temperature between 35-40°c.
As temperature is increased, the optimum temperature is reached where the rate of reaction is maximum. When beef liver is boiled, hydrogen peroxide is not broken down because higher temperatures denature enzymes making them non effective.
 
        
             
        
        
        
Sea star
explanation: a marine invertebrate of the phylum Echinodermata, such as a starfish, sea urchin, or sea cucumber.
        
                    
             
        
        
        
 
Explanation:porque cada una es diferente