What causes smoker's cough?
A) Smoking affects the respiratory center neurons in the medulla.
B) Smoking damages the cilia that normally remove debris-laden mucus.
C) Nicotine irritates the lining of the lung.
D) Carbon monoxide in the smoke triggers the cough reflex.
B
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A definitive diagnosis can be made in a Trichinella infection on the basis of which of the following findings?
a. Presence of adult worms in the feces b. Identification of encysted larvae through muscle biopsy c. Presence of cutaneous larvae migrans in the skin d. Identification of unembryonated eggs in the feces
Four of the following statements about Denisovians are true. Which statement is false?
a. They are most closely related to Homo erectus. b. The first fossils were found in Siberia. c. Fossils attributed to this group have been found in Spain. d. The first fossil to be found was a pinky finger. e. They may be at least 400,000 years old.
Which of the following is not a function of a stem?
positioning The leaves for photosynthesis supporting the overall shape of the plant water and mineral absorption vertical growth
The ________ are the most diverse seedless vascular plants
Fill in the blank(s) with correct word