Final answer:
True, evidence can change over time as new research studies are conducted.
Step-by-step explanation:
Evidence can indeed change over time as new research studies are conducted, reflecting the dynamic nature of scientific inquiry. True is the correct answer. Scientific understanding evolves with new observations and experiments, which is why a dramatic change in scientific understanding is often referred to as a paradigm shift. Science is considered a process, where data that does not support a hypothesis can still be incredibly useful for refining theories or providing directions for further research.
It is vital in scientific research to have the ability to falsify hypotheses, ensuring that evidence and theories can be tested and refined. Experimentation, while crucial, is not the sole valid type of scientific investigation, as other methods also contribute valuable insights. Additionally, experiments can be conducted on humans, but they must adhere to strict ethical guidelines. Larger sample sizes are generally preferred as they offer more robust findings.