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Biology Quiz MCQ Practice

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1. The organ responsible for pumping blood throughout the human body is the:

  1. A. Liver
  2. B. Kidney
  3. C. Lungs
  4. D. Heart
Answer: Heart
Explanation: Heart — verified fact for Biology Quiz.
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2. Photosynthesis in plants primarily occurs in which organelle?

  1. A. Nucleus
  2. B. Mitochondria
  3. C. Chloroplast
  4. D. Ribosome
Answer: Chloroplast
Explanation: Chloroplast — verified fact for Biology Quiz.
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3. The gas absorbed by plants during photosynthesis is:

  1. A. Nitrogen
  2. B. Carbon dioxide
  3. C. Hydrogen
  4. D. Oxygen
Answer: Carbon dioxide
Explanation: Carbon dioxide — verified fact for Biology Quiz.
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