An oxygen molecule moving from the mouth to an alveolus encounters structures in which of the sequences listed below?
A. pharynx>larynx>trachea
B. larynx>pharynx>trachea
C. trachea>pharynx>larynx
D. larynx>trachea>pharynx
Answer: A. pharynx>larynx>trachea
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1.Ascomycete
2.Basidiomycete
3.Chytrid
4.Zygomycete
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