The skin plays a role in the production of vitamin D because when dehydrocholesterol reaches the skin by means of the blood and is exposed to ultraviolet light from the sun, it changes to vitamin D in an inactive form.
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Answer:
C. Bronchial
Explanation:
The different types of lung sounds, also known as breath sounds differ from each other with respect to their location, pitch, relative duration, and intensity. 
The bronchial breath sounds are heard just above the clavicle on either side of sternum bone and are characterized by loud amplitude, harsh quality, and high pitch. The bronchial breath sounds are hollow tubular. 
The bronchial breath sounds have a short period of silence between the inspiratory and expiratory sounds. The expiratory bronchial sounds last longer than the inspiratory bronchial sounds (I<E).
 
        
             
        
        
        
When Rutherford performed his metal foil experiment, he was surprised that most of the alpha particles passed straight through the foil. 
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Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time there are 20 amino acids.