Select the statement that most accurately describes the action of antimicrobial drugs today.
A. The development of antiviral drug resistance has not been observed, as compared to the high rate of antibiotic resistance seen today.
B. Effective antiviral drugs have a long history of development and use.
C. Antiviral drug treatment is more effective than vaccination against a viral disease.
D. Antiviral drugs often result in toxic side effects due to their inhibition of host cell activity.
Answer: D
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What will be an ideal response?
The process of converting nitrogen gas to ammonium is called
A) biogeochemical processing. B) sublimation. C) nitrogen fixation. D) evaporation. E) nitrification.
Which of the following is NOT true concerning plant tissue culture?
(a). New plants can be cultivated from any existing plant cell. (b). Most plant cells are totipotent, meaning an entire plant can be produced from one cell. (c). Hormones can be used to cause the production of shoots from tissue. (d). Plants can be produced from shoot tips, leaves, and anthers. (e). Foreign genes such as those from other plants or even animals can be inserted into plant cells.
Which of the following statements about the humoral immune response is true?
A) The humoral immune response defends against bacteria and viruses by activating T cells. B) The humoral immune response defends primarily against bacteria and viruses present in body fluids. C) The humoral immune response plays a major role in protecting the body from cancerous cells. D) The humoral immune response is the result of macrophages producing antibodies.