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It enters the atmosphere through both natural and human sources. Natural resources can be for instance volcanic eruptions, bacterial processes, evaporation from water, or decaying organisms. ... Sulfur dioxide may also react with water to produce sulfuric acid (H2SO4).
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The correct answer is option (a) "Increase the amount of neurotransmitters secreted".
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Presynaptic neurons are helpful cells at chemical synapsis because they increase the intensity of the transmitted signals by increasing the amount of neurotransmitters secreted. The neurotransmitters are the carriers of information from the pre-synaptic—sending—neuron to the post-synaptic—receiving—cell, which results in an action potential.
 
        
             
        
        
        
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There are many animals that may survive a flood like a goose, swan.  But the main animal would be a duck which have webbed feet to help them get swim through the water to finally fly up into the air and find a nice place to rest and make a new nest. also having the feathers to have the water roll right off them  making it so the water does not weigh them down when flying. also ducks can dive under the water about 5 feet to retrieve food.
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I hope this helped!!
 
        
             
        
        
        
I just took the test and it said the correct answer is true
        
                    
             
        
        
        
A negative feedback loop is a reaction that causes a decrease in function. ... Often, it causes the output of a system to be lessened; so, the feedback tends to stabilize the system. This can be referred to as homeostasis, as in biology, or equilibrium, as in mechanics.