Answer:
tissue
Explanation:
a tissue is a group of cells that work together to perform a common function
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
Missense mutations.
Hope this helps!
