Answer:
Brain cells are very sensitive to a lack of oxygen. Some brain cells start dying less than 5 minutes after their oxygen supply disappears. As a result, brain hypoxia can rapidly cause severe brain damage or death.
Explanation:
Other symptoms can include: hallucinations and delusions; increased agitation and confusion; depression and other mood disorders; personality changes, such as irritability and a reduced threshold for frustration; and an inability to focus or concentrate.
 
        
                    
             
        
        
        
Answer:
circulatory system is the answer
 
        
                    
             
        
        
        
I think it is B because a cladogram shows how species are related AND also shows the evolution between them.
        
             
        
        
        
Answer: i'm pretty sure its B!!!
Explanation:
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Copepods will be the least effected by the oil spill. 
Therefore I believe the correct answer should be Copepods 10 arrow pointing right Seahorse 1,000 arrow pointing right Stingray 2,500
Good luck! Hope this helps!