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In microbiology, __________is defined as an increase in the number of cells.
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Growth
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Cell division that is accomplished by cell elongation followed by a cell division to create two nearly identical daughter cells is called __________.
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Binary fission
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__________ is defined as the change in cell number or cell mass per unit time.
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Growth rate
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An organism that grows best at pH 2.0, but fails to grow above pH 5, would be considered a/an __________.
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Obligate acidophile
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__________ is one of the most, if not the most, important environmental factors affecting growth and survival of microorganisms.
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Temperature
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The __________ temperatures include the minimum, optimum, and maximum temperatures at which growth of a specific microorganism is observed.
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Cardinal
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Optimal growth temperature of 28°C, but will grow, albeit slowly, at 0°C. This organism would be considered a/an __________
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Psychrotolerant
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An organism that has an optimum temperature for growth in excess of 80* C is called a/an __________.
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Hyperthermophile
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The enzyme that was isolated from Thermus aquaticus, and is critical for the polymerase chain reaction is called __________.
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Taq polymerase
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The average time required for a freshly divided cell to divide into two daughter cells is called the
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Generation time.
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In a typical growth experiment, the most rapid increase in cell number occurs
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During the last stages of exponential growth.
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Cells in this stage of growth are not dividing.
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Lag
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In this phase of growth, cells are either not growing, or growing at a rate that is the same as cell death rate.
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Stationary
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In this phase of growth, cells are actively dividing, and growth is occurring.
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Exponential
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The rule of thumb is that during a plate count, one only counts plates that contain _______________ colonies.
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30 - 300
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