Carriers that shed and transmit pathogens while they are recovering from an infectious disease are called ________ carriers.
A. passive
B. convalescent
C. asymptomatic
D. chronic
E. incubation
Answer: B
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Which of the following is NOT a criterion for an organism's genetic material?
A. The genetic material must contain information necessary to construct a whole organism. B. The genetic material must be transmitted from parent to offspring. C. To transmit information the genetic material must be replicated. D. The genetic material must be dynamic, changing rapidly in response to changes in the environment. E. Genetic material must account for the known variation within each species and among different species.
The complement system serves to:
a. increase blood flow to the area of infec-tion and can also effectively wall off the infection through the production of barrier substances. b. attract and enhance the activities of pha-gocytes. c. provide substances secreted by one type of cell, which have substantial effects on the antiinfective activities of other cells. d. ingest and destroy microorganisms.
Half of all human tumor cells have been discovered to contain a mutation in the which of the following genes?
a. p21 b. p34 c. p47 d. p53
From the equator to latitudes 10° north and south, high rainfall, high humidity, and mild temperatures can support
____________________. Fill in the blank(s) with the appropriate word(s).