The Gram stain is an example of a stain, because the process uses two contrasting stains to separate bacteria into groups based on cell wall composition.

differential stain

Explanation:

Differential stain -

It refers to the process of staining , which comprises of more than one chemical stain , is referred to as differential staining .

Multiple stains enables better differentiation between the microorganisms .

Gram stain is also an example of differential stain , as it uses two stains for testing process .

Hence , from the given information of the question ,

The correct answer is differential stain .

no i don't feel that humans have oversubscribed some medications

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.