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Preview questions
1. What is the basic unit of life?
Atom · Cell · Tissue · Organ
2. Which process involves the intake of food?
Respiration · Digestion · Excretion · Reproduction
3. What is the primary function of the respiratory system?
Digestion · Gas exchange · Circulation · Excretion
4. Which organ is responsible for pumping blood?
Liver · Lungs · Heart · Kidney
5. What is the process of removing waste from the body called?
Digestion · Excretion · Respiration · Circulation
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