During which stage of syphilis is the patient non-infectious?

A. first
B. second
C. third
D. fifth


C

Biology & Microbiology

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Answer the following statements true (T) or false (F)

1. The development of hypertension in humans is associated with obesity, smoking, age, and kidney disease. 2. In an open circulatory system, there is no difference between blood and interstitial fluid. 3. Relative to closed circulatory systems, Open Circulatory Systems pump hemolymph at relatively high pressure. 4. Blood is typically delivered to respiratory structures at low pressures in closed circulatory systems.

Biology & Microbiology

Food is formed into a bolus in the ____

a. large intestine b. liver c. mouth d. small intestine e. stomach

Biology & Microbiology

Which kind of exercise makes skeletal muscles

more resistant to fatigue?

a. high intensity-short duration b. low intensity-long duration c. medium intensity-medium duration d. high intensity-long duration e. low intensity-short duration

Biology & Microbiology

What conclusions did Beadle and Tatum reach with their studies of Neurospora?

a. Each mutant gene affected three enzymes. b. Each mutant gene affected a pair of enzymes. c. Each mutant gene affected only one enzyme. d. Mutant genes had no effect on the enzymes produced by the cells. e. Each mutant gene affected as many enzymes as were present in a particular metabolic pathway

Biology & Microbiology