Answer:
in my opinion I think it's amino Acids
The answer is B) hope this helped you
Answer:
Respiratory epithelial cells line the respiratory tract from trachea to bronchi into bronchioles and alveolar sacs. ... The goblet cells produce and secrete mucous to trap pathogens and debris within the airway tract. Basal cells are progenitor cells that differentiate into cells types found within the epithelium.
according to my biology teacher it's true. so there you have it.
A trait that is visible is eye color
