Answer: C. The heart rate gets faster.
Explanation:
its true also give brainliest
 
        
             
        
        
        
Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned.
        
             
        
        
        
Enzymes are proteins that are biological catalysts 
They reduce the activation energy required for a reaction to occur and thus speed up a reaction 
Temperature, above a certain point (optimum temperature) causes them to break down and they are gradually destroyed (denaturing) 
They work best at a particular pH (optimum pH) and are once again destroyed by low or high pH's 
They have a specific shape, with one particular part, known as the active site, that is specific to the substrate they speed the reaction of. These means they are specific to one type of reaction. 
They aren't used in the reaction so they're re-usable. 
 If it isn't one of these then it is not one of the properties of enzymes
        
             
        
        
        
Answer: It’s definitely not D. I’m thinking A or C
Explanation:
Because survival of the fittest mean that the ones that aren’t the best will die basically. So that why it’s not D 
 
        
                    
             
        
        
        
Genetic Change in Viruses. Viruses are continuously changing as a result of genetic selection. They undergo subtle genetic changes through mutation and major genetic changes through recombination. Mutation occurs when an error is incorporated in the viral genome