Match the definition with the name of the growth phase in the growth curve.
|___Number of dying cells is higher than the number of cells dividing||A. Lag phase|
|___Number of new cells equal to number of dying cells||B. Log phase|
|___New enzymes to use available nutrients are induced||C. Stationary phase|
|___Binary fission is occurring at maximum rate||D. Death phase|
Four tubes are illustrated with cultures grown in a medium that slows oxygen diffusion. Match the culture tube with the correct type of bacteria from the following list: facultative anaerobe, obligate anaerobe, microaerophile, aerotolerant anaerobe, obligate aerobe.
Match the type of bacterium with its environment. Each choice may be used once, more than once, or not at all. Put the appropriate letter beside the environment.
|___psychotroph||A. food spoiling in refrigerator|
|___mesophile||B. hydrothermal vent|
|___thermophile||C. deep ocean waters|
|___hyperthermophile||D. human pathogen|
|___psychrophile||E. garden compost|