A dependent variable is how they are recording, measuring or keeping track of the science experiment their doing.
A independent variable is the things/types there using to compare what is the most/least affective in the experiment.
A controlled variable is something that stays the same in the experiment or a group/set used for comparison
I think it is
<span>D. It takes place along an unraveled section of DNA</span>
natural selection light water and carbon dioxide
It is because of MOLD glad to help!
Answer: adenine, thymine, guanine and cytosine
Explanation: Adenine always binds with thymine, and cytosine always binds with guanine.
