Well the flu is a virus. Knowing it’s a virus we know they multiply by entering a cell and passing over there rna then converted to be dna and creating other versions of them selfs until cytolysis occurs meaning the cell explodes with these new viruses and do the same with other cells. Since these dna conventions to create protein body parts of virus means there’s a increase in chemical reactions in the body and enzyme production. Also since your body has an immune system it can sense these antigens from the virus’s and cause increase in certain white blood cells to come in and kill these viruses and cells. In essence chemical and enzyme reactions increase. To survive.
        
             
        
        
        
The answer is 2 and 5
* can breed and create fertile offspring
* have similar morphology
Species is defined as group of organisms that are of the same morphology (may have multiple lines within the group) and has the ability to mate and produce viable, fertile offspring. 
 
        
                    
             
        
        
        
BrotherEye Online
Answer:
Greeatings here is the soulution to your question
Explanation:
El Niño (the warm phase) and La Niña (the cool phase) lead to significant differences from the average ocean temperatures, winds, surface pressure, and rainfall across parts of the tropical Pacific. Neutral indicates that conditions are near their long-term average.
 
        
                    
             
        
        
        
I think 167 because it takes 1 year for it to grow 3 cm so 500/3 is 167