Question

question 3
1 pts
an experimental sample/treatment that does not contain the variable to be tested is called a

test sample.
control sample.
non - variable sample.
mitochondrial sample.

Explanation:

In experimental design, a control sample is used as a standard of comparison. It does not contain the variable being tested, allowing researchers to observe the effect of the variable by comparing it with the test sample (which does contain the variable). A test sample contains the variable to be tested, a non - variable sample is not a standard term in this context, and a mitochondrial sample is related to studying mitochondria, not experimental control.

Answer:

B. control sample.