What are the structures of vascular plants considered during collection of plants?​

What is called the "building block" of life?

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

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?