Q1.2. Suppose you decide to design an experiment to test your friend's hypothesis about classical
music and studying. How will you define your
variables?
O. Both study music and test performance are
potentially confounding variables.
Independent variable: study music. Confounding
variable: test performance.
Independent variable: study music. Dependent
variable: test performance.
Independent variable: test performance.
Dependent variable: study music.

The correct answer is :

Independent variable: study music.

Dependent  variable: test performance.

Explanation:

Independent variable in a experiment is a variable or a factor that is manipulated or changed in a particular experiment to see its the effect on dependent variable of this change. In this case classical music is variable as it is manipulated to see if it has any effect on studying.

Dependent variable is a variable which is measured in experiment to find the result and affected by the independent variable. In this case testing the performance of subject is dependent variable as it is being measured and affected by classical music.

Thus, the correct answer is: Independent variable: study music.

Dependent  variable: test performance.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

i think the answer is g1

hope i

-lavira: )