CSS  :: Sexual Reproduction Physiology
            
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                The spawn of frogs always is seen on the surface of pond because:								
				
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                 Jelly is bouyant and keeps them on surface to provide them with proper heat and facilitate heat loss | [B].   | 
                 
				 They should remain protected from enemies in water				 
				 
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				 | [C].   | 
                 They should flow dry places for development | [D].   | 
                 None of these reasons |  
				 
				 				 
				  
                    
                    
                    
                    
                    
                    
                    
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