The systolic pressure for a normal young adult would be under
a. 60 mm Hg.
b. 80 mm Hg.
c. 100 mm Hg.
d. 120 mm Hg.
e. 140 mm Hg.
D
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The most prevalent human infectious diseases are caused by
A) bacteria. B) viruses. C) fungi. D) protozoans.
Viruses are not considered to be living things, although they can evolve, and they do have genetic material. However, they
a. cannot reproduce on their own. b. cannot cause disease. c. possess a molecular structure entirely different from living cells. d. do not possess DNA. e. do not possess enzymes.
When growth proceeds at a rate similar to 2 ? 4 ? 8 ? 16 ? 32 ? 64...etc., it is called
Select one: a. arithmetic growth. b. additive growth. c. exponential growth. d. zero population growth. e. carrying capacity.
Four elements combine to make about 96% of the mass of the human body. Which of the following elements is one of the four?
A. calcium B. iron C. phosphorus D. carbon