Sorry i cant see that question
        
             
        
        
        
Answer:
c Size is the answer hope it helps
 
        
                    
             
        
        
        
<span>a) the active site is a site on the enzyme molecule where specific substrate molecules bind.
because an active site is </span><span>a region on an enzyme that binds to a protein or other substance during a reaction.
hope this helps :) brainliest? i really need one! </span>
        
                    
             
        
        
        
The tertiary consumer will receive 500 calories.
<u>Explanation:</u>
Calories produced by the producer = 500,000
The flow of energy through different trophic levels is 10%
After producer comes the primary consumer followed by secondary consumer followed by tertiary consumer.
Energy reached to primary consumer = 
                                                                = 50000 calories
Energy reached to secondary consumer = 
                                                                     = 5000 calories
Energy reached to tertiary consumer = 
                                                               = 500 calories
Therefore, the tertiary consumer will receive 500 calories.