Galpayage and co-workers disinfected the wooden balls after each experiment. If they had not included this step, how might this have impacted their interpretation of the data?

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Identify the purpose of disinfecting the wooden balls, which is to eliminate any residual bacteria or contaminants that could influence the outcome of subsequent experiments.

Consider the potential accumulation of bacteria or other microorganisms on the wooden balls if they were not disinfected. This could introduce variables that are not controlled across different experimental trials.

Analyze how the presence of these uncontrolled variables (e.g., different types or amounts of bacteria) could affect the results of the experiments, potentially leading to inconsistent or misleading data.

Discuss the importance of consistency in experimental conditions to ensure that the data collected is solely due to the experimental treatment and not due to extraneous factors.

Reflect on how failing to disinfect could lead to incorrect conclusions being drawn from the experiment, as the observed effects might be attributed to the experimental treatment when they are actually due to contamination.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Contamination

Contamination refers to the introduction of unwanted substances or organisms into an experimental setup. In biological experiments, if the wooden balls were not disinfected, residual microbes from previous experiments could skew results, leading to inaccurate interpretations of the data. This could result in false positives or negatives, affecting the reliability of the findings.

Experimental Control

Experimental control is a fundamental principle in scientific research that involves keeping all variables constant except for the one being tested. By disinfecting the wooden balls, the researchers ensured that any observed effects in their experiments could be attributed solely to the variables of interest, rather than to external factors like contamination, thus enhancing the validity of their conclusions.

Data Integrity

Data integrity refers to the accuracy and consistency of data collected during an experiment. If the wooden balls were not disinfected, the integrity of the data could be compromised due to the influence of contaminants. This could lead to misleading results, making it difficult to draw reliable conclusions and potentially undermining the overall credibility of the research.

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