Answer:
The second one. 
Explanation:
Purpose, hypothesis, procedure, data, analysis, and conclusion. 
 
        
             
        
        
        
Answer: Denaturing
Explanation: Enzymes are made of amino acids that are linked by bonds, amongst those bonds are hydrogen bonds that are very weak. High temperatures and low pH(acidity) breaks those bonds changing the molecular conformation of the enzymes. That way they denature and loss the ability to perform their functions. High temperatures and acidity alter the structure of their active site preventing the substrate from binding to them. While high temperatures denatures enzymes, low temperature renders them inactive. 
 
        
             
        
        
        
Possession of flagellum is not a taxonomic feature. many different unrelated organisms have flagellum. euglena, zooflagellates but also some fungi or even human sperm cells.
        
             
        
        
        
An environmental scientist might study the effect of soil pollution on plant growth. This is true.
Hope this helped :)
        
                    
             
        
        
        
Answer:
Blood taken from an artery in the leg is oxygenated while blood taken from a vein in the leg is deoxygenated.