Freezing is an effective means of destroying bacteria
Indicate whether this statement is true or false.
FALSE
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A high school student in Nepal is accepted—and eventually attends—college in the United States. His diet goes from one that is rich in vegetables and grains to one that primarily consists of meat and sugars
What will happen to the bacterial composition of his intestines? A. There will be more Firmicutes inhabiting his intestinal tract. B. There will be more Bacteroidetes inhabiting his intestinal tract. C. Nothing will happen; there is no relationship between bacteria in the intestines and diet. D. Bacteria will no longer inhabit his intestines.
Which of the following occurs when allolactose levels increase in E. coli?
A. Transcription of genes within the lac operon increases. B. Transcription of genes within the lac operon decreases. C. Transcription of genes within the lac operon does not change. D. E. coli cells replicate rapidly. E. The tryptophan operon becomes more active.
Which of the following benefits from biodiversity would be categorized as an ecosystem service?
a. anticancer drug Taxol, derived from the yew tree b. plants and fruits that are edible by humans c. cotton and other useful plant-derived fibers d. decomposition of wastes e. wild organisms as a source of genes for genetic engineering
Considering the diseases and conditions described in this chapter, those transmitted by respiratory droplets are caused by ________.
A. viruses B. fungi C. bacteria D. All of these answers are correct.