Question

the scientific method is a(n) choose one option a series of steps scientists use to answer questions and investigate problems. b experiment done using two variables. c way of dividing test subjects into two groups with one group getting a placebo. d way to divide cells during reproduction.

Explanation:

• Option A: The scientific method is defined as a systematic series of steps (like observation, hypothesis, experimentation, analysis, conclusion) that scientists follow to answer questions and investigate problems.
• Option B: An experiment with two variables is just a type of experimental design, not the scientific method itself.
• Option C: Dividing test subjects into groups with a placebo is a part of experimental design (like in clinical trials), not the entire scientific method.
• Option D: Cell division during reproduction is related to biological processes like mitosis/meiosis, not the scientific method.

Answer:

A. series of steps scientists use to answer questions and investigate problems.