Can we entirely get rid of environmental noise?

• A. No.
• B. Yes.
• C. Only with perfect genetic control.
• D. Only by increasing group size.

Answer: (A)

Environmental noise is the non-genetic variation that affects phenotype, and it cannot be completely removed. Even in tightly controlled settings there are random fluctuations, measurement error, and tiny differences in the micro-environment that create residual variation. You can greatly reduce environmental variance through careful experimental design—randomization, replication, blocking, standardized conditions, and precise measurements—which improves the ability to detect genetic differences, but zero environmental variation is unattainable. So, the best answer is that we cannot entirely get rid of environmental noise. While perfect genetic control or larger group sizes can help, they do not eliminate it completely—the environment will still exert some influence.