Mutations can occur during DNA replication if errors are made and not corrected in time. Mutations can also occur as the result of exposure to environmental factors such as smoking, sunlight and radiation.
        
             
        
        
        
What the graph shows about the activity of an enzyme is, it increased and then decreased.
        
                    
             
        
        
        
Considering the attached figure; the functional area of the kidney at letter b; is the Renal pyramid. 
Kidney pyramid or renal pyramid consist of tubules that transport urine from the cortical, or outer part of the kidney, where the urine is produced, to the calyces, or cup-shaped cavities where the urine collects before passing to the bladder through the ureter.
 
        
        
        
Answer:
Mammals
Explanation:
Humans are classified as mammals because humans have the same distinctive features (listed above) found in all members of this large group. Humans are also classified within: the subgroup of mammals called primates; and the subgroup of primates called apes and in particular the 'Great Apes'
 
        
                    
             
        
        
        
Answer:Student 4
Explanation: Because if the mountain lions, coyotes, and bobcats decrease they arent enough to prey on the deer which causes the deer population to be able to reproduce over time.