A membrane lipid is a compound which belongs to a group of (structurally similar to fats and oils) which form the double-layered surface of all cells (lipid bilayer). The three major classes of membrane lipids are phospholipids, glycolipids, and cholesterol.
        
                    
             
        
        
        
 Answer:
I think its bone, air and hence
Explanation:
 
        
                    
             
        
        
        
Answer: A) dinosaurs
Explanation:
Global shift from a warmer tropical climate to a colder climate may have been the cause of the dinosaur extinction