Chromatography is a chemical process through which scientist can separate mixed elements to analyze them individually.
It basically consists in dissolving the mixture in a liquid that separates the different elements as a purification process.
Forensic Scientists use it in different forms while processing samples, for example:
* Planar Chromatography that can identify if two samples are the same.
* HPLC that can detect explosive components and some specific drugs.
* Gas Chromatography can detect the presence of alcohol, drugs or poison in a body prior to its death.
<span>the right answer is C. Make it bigger</span>
To improve the introduction of his essay, the sentence that Reese should add before sentence 1 to create a more effective introduction is:
C. Over the past centuries, many of the mysteries of the human body have been explained by science.
- The very first line is Reese' introduction is: "<u>But </u><u>there is still one part of the human body that confuses scientists: the brain.</u>"
- The sentence above begins with the conjunction "but". "But" is used to indicate contrast between two ideas.
- That means the sentence that must be placed before that one should convey a different, contrasting, or even opposite idea.
- Reese mentions that the brain still confuses scientists. Thus, the sentence that we must add should talk about the opposite idea - <u>scientists figuring things out.</u>
- That is why letter C is the correct option. This is how the two sentences go together:
"Over the past centuries, many of the mysteries of the human body have been explained by science. But there is still one part of the human body that confuses scientists: the brain."
Learn more about the topic here:
brainly.com/question/14386281
