Which of the following lists best illustrates the idea of increasing levels of complexity?1) Cells, tissues, organelles, organs, systems.2) Tissues, cells, organs, organelles, systems.3) Organs, organelles, systems, cells, tissues.4) Organelles, cells, tissues, organs, systems.

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs