The establishment of a pathogenic microbe in the host or the presence of a microbe in a location of the host where it is not typically found is referred to as a/an __________.
Fill in the blank(s) with the appropriate word(s).
Ans: Infection
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A group of your colleagues has collected disused lab equipment in a storage closet, with the intention of brewing their own hard cider for parties after work. After carefully sterilizing their equipment, they add apple juice, table sugar, and a bacterial culture derived from fermenting yogurt to several large bottles, leaving each half empty, then turn off the lights, lock the closet, and wait. After checking a week later, your colleagues are disappointed to discover that the contents of their bottles are not fit for human consumption. What mistake did they make?
a. Without light, the fermentation process was unable to begin. b. Air in the bottles caused the apple juice to oxidize and decompose. c. Bacteria perform lactic acid fermentation, not alcohol fermentation. d. Alcohol fermentation will not occur without a constant heat source.
Cellular respiration produces O2
1.True 2.False
Which of the following is NOT true about hagfishes?
a. They are jawless chordates with some resemblances to lancelets and some to vertebrates. b. They possess a partial cartilaginous cranium. c. They are known only from the fossil record. d. When threatened they secrete copious amounts of mucus. e. They lack jaws.
Gene transcription is induced by
a. A. b. B. c. C. d. D. e. none of these.