<span>If a baby is born with two X chromosomes, it must be female. Males have XY chromosomes, females have XX chromosomes, due to how the chromosomes are naturally passed from parents to a child.</span>
        
                    
             
        
        
        
Lipids are broken down by lipase, with the assistance of bile for emulsifying and providing optimum pH for the enzyme
        
             
        
        
        
Answer:
- In claustrophobic laboratory a dog is forced to breathe tobacco smoke.
- In another lab, a rat is squeezed into a narrow glass tube and forced to breathe in tobacco smoke.
Both of these sentences hook to draw the reader's attention. 
These are such cruel acts done by scientists, action shall be taken against such insane work. Tobacco is so damaging to humans, then just imagine its consequences on these poor animals. Bioethics rules shall be kept in mind before doing such cruel acts.