You see an advertisement on the television with a very good looking person showing off a new, shiny,
powerful car. You seriously think about buying that particular car. Therefore, the person in the
advertisement could best be described as the:a.
sign stimulus.
b. operant conditioner.
c. imprinter.
d. classic conditioner.
e. negative reinforcer
A
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Nitrogen is made available to plants for their use by the process(es) of ____
a. ammonification only b. nitrification only c. nitrogen fixation only d. ammonification and nitrification only e. ammonification, nitrification, and nitrogen fixation
Which of the following contribute to the environmental resistance of bacterial endospores?
A. Presence of calcium dipicolinate B. Spore coat C. Low water content of endospore D. Lower pH E. All of the choices are correct.
Place the following in order by level of resistance with highest resistance first.
A) prions, endospores, protozoan cysts, fungal spores B) prions, protozoan cysts, fungal spores, naked viruses C) endospores, fungal spores, hyphae, prions D) bacterial vegetative cells, prions, naked viruses, protozoan cysts
Three scientists are using different forms of PCR for their research. Abby wants to determine changes in gene expression levels in a tissue, so she uses ________. Bob is trying to extract genetic information from a wooly mammoth fossil, so he uses ________. Chris needs to express a gene in bacteria that matches the form expressed in kidney cells, so she uses ________.
A. quantitative RT-PCR; PCR; RT-PCR B. RT-PCR; quantitative RT-PCR; PCR C. RT-PCR; PCR; quantitative RT-PCR D. quantitative RT-PCR; RT-PCR; PCR E. PCR; quantitative RT-PCR; RT-PCR