Mycobacteria secrete a waxy coating that makes this disease difficult to treat using antibiotics:
A. Whooping cough
B. Cholera
C. Lyme disease
D. Impetigo
E. Tuberculosis
Answer: D
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Which of the following statements is true regarding respiration in birds? Choose all that
A. Bird lungs inflate due to negative pressure in the chest cavity. B. Bird lungs deflate due to negative pressure in the chest cavity. C. Oxygen enters the bloodstream via crosscurrent exchange. D. Oxygen enters the bloodstream via countercurrent exchange. E. Respiration depends on the movement of air through air sacs. F. Respiration depends on the movement of air through spiracles.
An early attempt by Cohn at bacterial classification grouped bacteria according to their
A. biochemistry. B. Gram stain. C. shape. D. arrangement.
If an organism produces abnormally high levels of leptin, predict what would happen to that organism's weight, and explain why the change would occur.
A. Weight loss would occur as a result of decreased digestive enzyme production. B. Weight loss would occur as a result of decreased appetite. C. Weight loss would occur as a result of increased metabolic activity and reduced fat storage. D. Weight gain would occur as a result of increased appetite. E. Weight gain would occur as a result of increased fat storage.
Which of the following statements about AIDS is true?
A) The AIDS vaccine can prevent the spread of HIV. B) There is now a treatment for AIDS that is simple and effective. C) Using condoms during sex prevents the spread of the virus that causes AIDS. D) AIDS patients live no longer than 2 to 3 years.