To produce hormones and also to produce electrical impulses
        
                    
             
        
        
        
Answer:
Systemic circulation carries oxygenated blood from the left ventricle, through the arteries, to the capillaries in the tissues of the body. From the tissue capillaries, the deoxygenated blood returns through a system of veins to the right atrium of the heart.
Explanation:
i hope it helps..
 
        
             
        
        
        
Centipedes are carnivores, they use venom to kill their prey. They are preyed upon by birds, toads and shrews.
        
             
        
        
        
Photosynthesis reverses the biochemical pathways of respiration.
 
        
                    
             
        
        
        
Answer:
C. disruptive natural selection
Explanation:
Disruptive selection is a type of natural selection in which extreme phenotypes are favored over intermediate phenotypes in a population. Environmental change is a major factor that can bring about disruptive selection. The individuals with the extreme phenotypes adapt well and are able to survive in the particular environment, while those individuals with intermediate phenotypes would hardly survive or be greatly reduced in number.
The gray rock outcrops and the brown soils of the Island favors the survival of mice with brown and gray fur color respectively. The fur colors of these two extreme phenotypes in the population of mice, have helped both varieties against Hawks as their main predators, hence establishing their existence on the Island.