Answer:
B
Explanation:
Amount of energy decreases as it goes higher up the trophic levels. 
 
        
                    
             
        
        
        
Answer:Mutualism: both partners benefit
Explanation:
 
        
             
        
        
        
As we know that
<span>P total = pO +pH +pN</span>
<span>so</span>
P = P1 + P2 + P3
378 kPa= 212 kPa + 101 kPa + P(H2)
P(H2) = 65 kPa
partial pressure is 65
so correct option is A 
hope it helps
 
        
                    
             
        
        
        
Answer: B: take a family history and suggest genetic testing
Explanation:
I took it and got it right