The best explanation is that bacteria reproduce more rapidly. Bacteria adapt to other environmental conditions, such as adaptations to changes in temperature, pH, concentrations of ions such as sodium, and the nature of the surrounding support. Bacteria have been designed to be adaptable . Their surrounding layers and the genetic information for these and other structures associated with a bacterium are capable of alteration.
B. Vitamin B12 and C only. If you just add them up through each column and compare what he is supposed to have to what he gets in the meal then you will see he only meets his recommend B12 for the day and at least 75% of Vitamin C.