1. Which of the following statements best describes the concept of homeostasis? A. Homeostasis refers to the body's ability to maintain a stable internal environment despite external changes. B. Homeostasis is the process by which damaged cells are repaired and replaced. C. Homeostasis involves the body's response to a foreign invader, such as a virus or bacteria. D. Homeostasis is the body's ability to respond to stress and adapt to new environments. Answer: A. Homeostasis refers to the body's ability to maintain a stable internal environment despite external changes. This is essential for normal cellular function and overall health. 2. Which of the following best describes the process of osmosis? A. The movement of molecules from an area of lower concentration to an area of higher concentration. B. The movement of water across a semi-permeable membrane from an area of higher concentration to an area of lower concentration. C. The transport of large molecules into a cell using energy. D. The breakdown of food molecules to release energy for cellular functions. Answer: B. The movement of water across a semi-permeable membrane from an area of higher concentration to an area of lower concentration. Osmosis is essential for maintaining proper hydration levels in cells. 3. Which of the following is true regarding passive transport? A. Passive transport requires the use of energy to move molecules across a cell membrane. B. Passive transport moves molecules from an area of higher concentration to an area of lower concentration. C. Passive transport is a faster process than active transport.