Describe and explain what happens to the number of live bacteria shown in the stages labelled A, B, C and D

A is the lag phase - bacteria growing / dividing slowly- bacteria adjusting to conditions/ absorbing resources/ B is the exponential phase - resources are not limiting, bacteria growing/ dividing rapidly, growth birth greater than death rate C is the stationary phase -birth rate= death rate D is the death phase - death rate greater than birth rate C/ D - many bacteria dying, resources become limiting, space become limiting, toxins build up.