Answer:
euglena is the organism which has both plant and animal features
 
        
                    
             
        
        
        
The problem is that mold was growing in some of the dishes. The hypothesis is that the mold can cure bacteria.
        
             
        
        
        
The vaccine was made in the past year, and the flu virus has mutated and grown resistant to this year's flu vaccine
        
             
        
        
        
Answer:
c. single bond
b. double bond
d. unsaturated fatty acid
The rest is right :) 
Explanation:
"C" is a single bond because saturated fats only have single bonds (no double bonds!) 
Unsaturated fatty acids, on the other hand, have a double bond, creating a bent shape.