Answer: Their potential to regenerate and repair damaged tissue.
 
        
             
        
        
        
Amniotic Egg - This type of egg does not require water. Organisms could lay their eggs on land they would not dehydrate.
Lungs - got to be able to extract oxygen from their environment for cellular respiration.<span />
        
             
        
        
        
Answer:
mass
Explanation:
because the unit kg is S.I unit of mass