What is the definition of algae

What molecule does hemoglobin decay into over time

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

Archaebacteria use for movement. celia flagella pili cell walls