<prompt> Z-value of an organism:The time required to kill 90 of cells at a particular temperatureThe time required to kill all cells at a particular temperatureIs the temperature change required for the D-value to change by a factor of tenIs the temperature change required for the D-value to change by a factor of five  <response>: Ans. C. Is the temperature change required for the D-value to change by a factor of tena. D value of an organism is the time needed at a certain temperature to kill 90 of the organisms in the medium,b. Z-value of an organism is the temperature change required for the D-value to change by a factor of ten 