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In a well-designed experiment testing a new vitamin’s effect on fatigue, what is the main purpose of the control group?

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Course
Introduction to Human Biology
12 units50 lessons
Topics
Human BiologyAnatomy and PhysiologyCell BiologyGeneticsBiochemistryMolecular Biology
About this course

Explore life from molecules to organisms through an integrated survey of human biology. Build fluency with the scientific method, controls, and basic data interpretation. Examine chemistry of life, water and pH, and the structure–function roles of biomolecules. Investigate cell structure, membranes, transport, and cellular energetics. Connect DNA, gene expression, meiosis, and inheritance to human variation and evolution. Understand tissues, homeostasis, and coordination via neural and endocrine signaling. Survey major organ systems with health links, immunity, reproduction, and development. Apply core physics and chemistry—pressure/flow, diffusion, gradients, surface area, energy, and acid–base—to interpret simple clinical measures.