Q:
      
      
         
            
Which of these is unique to flowering plants?
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: A) double fertilization         
         
Explanation: In flowering plants one sperm nucleus fertilizes the egg and the other sperm nucleus fuses with two other nuclei found within the ovule, thus forming triploid endosperm.
 
Hence, double fertilization is unique to flowering plants.
       
      
      
      
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