Early formulations of this medium used a smaller amount of carbohydrate and occasionally produced false (pink) results after 48 hours. this phenomenon is called a reversion.

Inoculate a PR broth is a medium that used smaller amount of carbohydrate and may result to occasionally false pink after 48 hours. It is known to have slow growing fermenter that may indicate false negativity and also poor sensitivity with the result of the test.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.

a. population growth is decreasing

-2

+4

-10

-3

-8

-3

so the population decreased by 24 because 3+3+8+10+2=26-2=24.

hoped i !

explanation: