What is the proper sequence of air flow in the human respiratory system?
a. nasal cavities, larynx, pharynx, bronchi, trachea
b. nasal cavities, pharynx, bronchi, larynx, trachea
c. nasal cavities, pharynx, larynx, trachea, bronchi
d. nasal cavities, larynx, pharynx, trachea, bronchi
e. nasal cavities, bronchi, larynx, trachea, pharynx
C
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Bile salts are synthesized from
a. hydrochloric acid. b. uric acid. c. cholesterol. d. mucus. e. sodium chloride.
Refer to the accompanying figure. Which structure gives rise to the spinal cord?
a. 1 b. 2 c. 5 d. 8 e. 9
Which human activity is NOT a threat to biodiversity?
A) Application of synthetic fertilizers B) Importing pigs and goats in Hawaii for food C) Cattle ranching D) Building a large sugarcane plantation in a tropical rain forest E) No-till farming