A chronic disease is defined as one that:
a) has a short, but severe course
b) persists over a long period of time
c) spreads throughout the body
d) is subclinical; no symptoms are evident
Answer: b) persists over a long period of time
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If two solutions have unequal concentrations of a solute, the solution with the lower concentration is called
A. isotonic. B. hypertonic. C. hypotonic. D. osmosis.
If a woman has blood type O and a man has blood type AB, what is the probability that they will have a child with
blood type O?
a. 0 b. 1/16 c. 1/4 d. 1/2 e. 3/4
Four of these five choices are reasons to be concerned about increasing levels of UV radiation reaching Earth. Select the exception
a. mutations b. skin cancers c. slowing rate of photosynthesis d. decline in atmospheric oxygen e. global warming
Which of the following statements about ecological
succession is false? a. A disturbed area within a community may recover quickly if improved soil remains. b. Pioneer species are the start of community structure. c. The wastes and remains of early colonizers favor the survival of new species. d. Secondary succession occurs on a new volcanic island. e. Later successional species outcompete earlier species.