You could talk about pollution, trash on beaches...etc
        
             
        
        
        
Bacteria, hope this helps!
        
             
        
        
        
1. metacarpals
2. carpals
3. phalanges
        
             
        
        
        
The answer is A.
If the bicipe muscle contracts it will bring the forearm up because the insertion of this muscle is  in the forearm. 
One of the functions of this muscle is flexing the elbow, which would result in the action i already mentioned.
It couldn't be B, because that would be the work of another muscle, the triceps.
        
                    
             
        
        
        
Answer: i cinque isomeri possibili per l'esano sono n-esano, 2-metil pentano, 3-metil pentano, 2, 3-dimetilbutano e 2, 2-dimetilbutano. - 2-metil pentano è anche chiamato isoesano. - 2, 2-dimetil butano chiamato anche Neoesano.
Explanation: