ANSWER:
Lesions are areas of damage to motor neurons. Damage to upper motor neurons stops the signals your muscles need to move. When your muscles don't move for a long time, they become weak and stiff. Over time, it can become harder to walk and control your movement.
Explanation:
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<span>Many mutations do produce changes in phenotype,I</span>t helps the bodies of the species to re-adapt to more locations and habitats.
True...........................
