HomeEveryday Science MCQsApproximately, how many times each day do our heart valves open and close normally? 3. Approximately, how many times each day do our heart valves open and close normally?By Admin / September 17, 2025 A. 10,000 B. 1,00,000 C. 1,50,000 D. 2,00,000 ✅ The correct answer is option B.
1. Which of the following does not pollute the air? Leave a Comment / Everyday Science MCQs / By Admin
2. Which of the following planets have the longest day? Leave a Comment / Everyday Science MCQs / By Admin