Oxygen, sulfur, nitrogen, and hydrogen!
        
                    
             
        
        
        
The answer is C) chromosome :)
        
                    
             
        
        
        
Answer:
An ecological pyramid is a pyramid that illustrates the relations between living organisms at different levels
 
        
                    
             
        
        
        
A cool looking app gggggg
        
                    
             
        
        
        
According to ChaCha.com, "Parthenogenesis is a form of agamogenesis in which an unfertilized egg develops into a new individual. Parthenogenesis occurs naturally in many plants and invertebrates. This differs from other forms of asexual reproduction because an egg is used."