DNA provides information at the species level.
Hope it helps;Pls mark as brainliest answer
 
        
             
        
        
        
Bottleneck Effect where there is a steady decrease over time
        
             
        
        
        
From the process of respiration chemical energy in the form of ATP.
        
             
        
        
        
Answer:
Axon hillock
Explanation:
Neuron or nerve cell is excitable cell of the nervous system which consists of cell body or soma (karyon), dendrites and an axon. Dendrites are short, numerous filaments responsible for the signal receiving. On the other hand, axon is long ant it originates form the cell body from the swelling called axon hillock. At the end of an axon there are axon terminals from which neuron can transmit a signal  another cell.