A bioassay is a scientific test used to measure the effects of a substance on living organisms. This method helps researchers determine the potency and effectiveness of drugs, chemicals, or environmental samples by observing how they influence biological responses. Bioassays can involve various organisms, including bacteria, plants, or animals, depending on the study's goals. In a typical bioassay, a sample is introduced to a test organism, and researchers monitor changes in growth, behavior, or other physiological responses. The results provide valuable information about the safety and efficacy of substances, aiding in fields like pharmacology and toxicology.