The blood press sure of a solider is measured when he is resting. The same solidger is then exposed to a stressful environment and his blood pressure is measured again. IDENTIFY the independent. Dependent and constant variable. My question is what is the CONTROL VARIABLE PLZZZ HELP

Dna is colied into chromosomes in a cell

Explain why the plants cortex would serve as the best food source for animals

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