The answer of the question is A
        
                    
             
        
        
        
Answer:
Most living tissue contains catalase. We can use potatoes to help see catalase work because bubbles of oxygen form when we put potatoes into hydrogen peroxide.
Explanation:
As catalase decomposes hydrogen peroxide into water and oxygen gas, bubbles of oxygen collect on the disk. When the density of the combined paper/enzyme/O2 is less than the solution the disc will rise to the surface.
 
        
             
        
        
        
The given mutation of the DNA segment ctc ctc ttc to ctc ctt ttc is a known type of mutation in the gene for beta-globin. The translated protein remains unchanged because both the CTT and CTC codons code for the amino acid glutamic acid. 
        
                    
             
        
        
        
There is so much you can do to develop your sperm, intake of vitamins, nuts and the right food will definitely help.
        
             
        
        
        
Answer:
mosquitoes
Explanation:
more population means that they will eat more (decrease in mosquito population)