Answer: They represent different concepts
 
        
                    
             
        
        
        
Answer: c
Explanation: Plants and animals need nitrogen to make proteins but they cannot take it in from the air. Because nitrogen is unreactive as a gas, it has to be transformed into a new molecule. When bacteria in the soil takes nitrogen from the air, it becomes nitrates. Finally, it can move through the food chain in this form.
 
        
             
        
        
        
<span>The probability of an action potential being propagated from neuron to neuron is increased when the postsynaptic neuron's signal is in an excitatory state. During this state, the action potential of a presynaptic neuron increases the probability of transmission of a signal to the postsynaptic neuron.</span>
        
             
        
        
        
Answer:
<h2> I don't know but my Answer is </h2><h3>from different environments ,each structure suits their environment better than the other's</h3>
 
        
             
        
        
        
Answer:
In my opinion, the main differences between the laws and people's opinions regarding drug issues are given by the issue of prohibition. The law punishes consumers, however many people consider that a less punitive education and treatment is the solution to this problem.