Answer:
contractile vacuole
Explanation:
contractile vacuole is used for balance of water,salt etc
 
        
             
        
        
        
<span>The majority of the offspring population has functioning wings.</span>
        
                    
             
        
        
        
Answer: 
Carbon Dioxide 
Explanation:
Snails will produce only carbon dioxide, while the Elodea will produce carbon dioxide and oxygen gas. Snails and Elodea will produce more carbon dioxide, causing the water to turn yellow.
 
        
             
        
        
        
Hi lovely,
The answer you're looking for would be D) Spores