In order to examine cells which are smaller than can be detected by the human senses what needs to be used?
a. Patience
b. Hypotheses
c. Technology
d. A cell trap
e. None of the above
Ans: c. Technology
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How does azidothymidine (AZT) fight AIDS?
A. It targets the virus for destruction. B. It blocks the enzyme that assembles all of the RNA proteins into new HIV viruses. C. It blocks the virus from entering the cell. D. It blocks the enzyme that converts viral RNA to DNA (called reverse transcriptase, or RT).
A seedling growing toward the source of light is an example of:
a. shade avoidance. b. a positive hypersensitive response. c. a negative hypersensitive response. d. a positive phototropic response. e. a negative phototropic respons
Taxis is
a. another term for bacterial tumbling. b. caused by the undulating motion of a bacterium. c. another word for stimulus. d. movement towards or away from a stimulus.
Which of the following is the correct sequence for stages of Ehrlichia development in infected host cells?
A) initial body, morula, elementary body B) morula, elementary body, initial body C) initial body, elementary body, morula D) elementary body, initial body, morula E) morula, initial body, morula, elementary body