"REPRODUCTIVE ISOLATION" needs to occur for speciation to happen.....
        
             
        
        
        
Answer:
A. Blood is pushed through vessels 
Explanation:
Heart muscles contract and relax. The most important effect of this action on the human body is Blood is pushed through vessels. 
Hope it will help :)❤
 
        
                    
             
        
        
        
Answer:Both release carbon into the atmosphere, but burning fossil fuels releases CO2 at a much greater amount.
Both cellular respiration and combustion require a core fuel for the process to happen at all.
 
        
                    
             
        
        
        
Answer: The answer is Part F. Hope this helps :)
Explanation: