Yes Carbon dioxide is necessary for photosynthesis because Photosynthesis didn't go on because there was no Carbon dioxide in flask X.
The carbon dioxide was absorbed by the sodium hydroxide. In flask Y, the colour of the iodine solution turned blue black. This is because starch was present in the leaf of flask Y. Starch was present because it underwent photosynthesis.
 
        
             
        
        
        
Ribosomes produce the proteins
        
                    
             
        
        
        
It takes about one minute for a blood cell to make a complete circuit of the human body.
        
             
        
        
        
Answer:
Reproduction is when an organism mulitplies and creates descendants. The two types are sexual and asexual  
 
        
             
        
        
        
Answer:
A. The gene for making hair WILL NOT BE expressed in the lining of the stomach.
Explanation:
Gene expression is the process by which the instructions in our DNA are converted into a functional product, such as a protein.