Inhale and exhale because you inhale the oxygen and exhale the carbon dioxide
        
                    
             
        
        
        
D. The cytoplasm slides and forms a pseudopodium in front to move the cell forwards. 
        
                    
             
        
        
        
Liver- a vital organ only found in vertebrates which detoxifies various metabolites, synthesizes proteins and produces biochemicals necessary for digestion and growth. In humans, it is located in the right upper quadrant of the abdomen, below the diaphragm.
        
             
        
        
        
Unlike other ways of reproduction, sexual reproduction provides variation through inheriting various genes. This variation is essential for adaptation as it would not just create a copy of the original life form, but rather a different unique life form that could adapt to something, and then have it's own offspring with the adapted trait.
        
             
        
        
        
B)	Embryonic stem cell research requires the use of human embryos. Its an unethical dilemma.