Answer:
lag phase
Bacteria are metabolically very active, but the numbers are not increasing
log phase
Period of most rapid growth. Number of bacteria is increasing exponentially
stationary phase
Population growth has halted. Number of new cells formed balances the number of cells dying.
death phase
Rate of the cells death exceeds the rate at which new cells are being formed. Number of cells decline exponentially.
Step-by-step explanation:
There are four distinct phases in the bacterial growth curve -
a) lag phase - In this phase cellular activities takes place but the cell do not grow. Also the size of cells grow but no cell division happens
b) log phase - In this phase the cell starts dividing by the process of binary fission and start doubling themselves in numbers. Metabolic activity is at a high pace for preparing the cell for DNA replication.
c) stationary phase - After the full growth the population starts declining due to diminishing nutrients and accumulating waste products.
d) death phase - At this stage the quantity of waste becomes higher than the nutrients and thus the cell starts dying more and more.
lag phase
Bacteria are metabolically very active, but the numbers are not increasing
log phase
Period of most rapid growth. Number of bacteria is increasing exponentially
stationary phase
Population growth has halted. Number of new cells formed balances the number of cells dying.
death phase
Rate of the cells death exceeds the rate at which new cells are being formed. Number of cells decline exponentially.