: A disease is considered communicable when the infectious agent can be transmitted from infected host to new host and establish infection in that host.
a. true
b. false
a. true
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Which of the following statements concerning
cancer is most accurate?
a. Neoplasms are usually cancerous. b. Neoplasms have lost control over cell division. c. Tumor cells have an increased capacity for adhesion. d. Benign tumors often spread to other body parts. e. Metastasis is cell division which is stationary.
Four of the five actions listed below are responses of
the body to heat. Select the exception. a. increased sweating b. increased retention of blood in the core region c. decreased rate of muscle activity d. increased water loss e. dilation of peripheral blood vessels
In Griffith's transformation experiments,
A) mice infected with heat-killed S form and live R form caused pneumonia and death in the mice. B) the S form lacked an enzyme involved in the manufacture of the polysaccharide coat, leading to the abnormally smooth colonies. C) mice infected with live R form caused pneumonia and death in mice. D) the R form transformed the S form into a virulent variety of the bacteria.
Viruses that infect bacteria are specifically called _____.
Fill in the blank(s) with the appropriate word(s).