Exponential Phase It is a consequence of the fact that each cell divides to form two cells,each of which also divides to form two more cells,and so on. Most unicellular microorganisms grow exponentially,but rates of exponential growth vary greatly.In general,prokaryotes grow faster than eukaryotic microorganisms
Exponential Phase It is a consequence of the fact that each cell divides to form two cells, each of which also divides to form two more cells, and so on. Most unicellular microorganisms grow exponentially, but rates of exponential growth vary greatly. In general, prokaryotes grow faster than eukaryotic microorganisms
Stationary Phase If a single bacterium continued to grow exponentially for 48 hr,produce a population that weighed about 4000 times the weight of Earth!This is particularly impressive because a single bacterial cell weighs only about one-trillionth (10-12)of a gram. An essential nutrient of the culture medium is used up or some waste product of the organism builds up in the medium to an inhibitory level and exponential growth ceases,or both
If a single bacterium continued to grow exponentially for 48 hr, produce a population that weighed about 4000 times the weight of Earth! This is particularly impressive because a single bacterial cell weighs only about one-trillionth (10− l2) of a gram. Stationary Phase An essential nutrient of the culture medium is used up or some waste product of the organism builds up in the medium to an inhibitory level and exponential growth ceases,or both
Death Phase If incubation continues after a population reaches the stationary phase,the cells may remain alive and continue to metabolize,but they may also die.If the latter occurs,the population is said to be in the death phase
If incubation continues after a population reaches the stationary phase, the cells may remain alive and continue to metabolize, but they may also die. If the latter occurs, the population is said to be in the death phase. Death Phase
7.3 Measurement of Growth Population growth is measured by following changes in the number of cells or weight of cell mass
Population growth is measured by following changes in the number of cells or weight of cell mass. 7.3 Measurement of Growth