Examlex
Which one of the following could be produced by anaerobic bacteria decomposing biodegradable waste?
Treatments
In a research context, interventions applied to subjects or conditions to observe effects.
Factors
Variables or elements that contribute to a particular result or situation.
Experiments
Scientific procedures undertaken to discover an unknown effect, test a hypothesis, or demonstrate a known fact.
Placebo
A substance or treatment with no therapeutic effect, often used as a control in testing new drugs.
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