Question

A controlled experiment is one that:a) proceeds slowly enough that a scientist can make more careful records of the resultsb) may include experimental and control groups tested in parallelc) is repeated many times to make sure the results are accurated) keeps all environmental variables constante) is supervised by an experienced scientist

Answer 1

Answer:

b. may include experimental and control groups tested in parallel

Explanation:

A controlled experiment is an experiment with two test groups that are subjected to the same procedures and conditions except the variable whose effects is being studied on the subject.

It can also be described as an experiment in which the researcher can manipulate experimental subjects (by dividing them into two groups) to test a single variable.

The correct option is b.