Involves study designs used to answer why? and how?
a. analytic epidemiology
b. descriptive epidemiology
c. differential epidemiology
d. none of the above
Ans: a. analytic epidemiology
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Extremely halophilic Archaea often form ________ in order to access ________
A) stalks / nutrients B) intracellular inclusions / elemental sulfur C) gas vesicles / oxygen D) intracellular membranes / sunlight
An ideal vector
A. may be a plasmid or bacteriophage. B. has a restriction enzyme recognition site. C. contains an origin of replication. D. contains a selectable marker. E. All of the choices are correct.
Small RNAs can regulate gene expression. One type, called micro RNA (miRNA), acts by binding directly to
A. tRNA to prevent transcription. B. mRNA to prevent transcription. C. tRNA to prevent translation. D. mRNA to prevent translation.
In the logistic growth model, as the number of individuals in the population (N) approaches the carrying capacity (K), what happens to the intrinsic rate of growth (ri)?
A. It will be affected by increased competition within the species. B. It will be affected by a decreased death rate from predation. C. It will not change. D. It will be affected by an increased birth rate. E. It will be affected by increased competition with other species.