What is the average lifespan of human Red Blood Cells (RBCs)?

More Everyday Science MCQs

• What causes the occurrence of solar eclipses on Earth?
• Which astronomical object was reclassified as a ‘dwarf planet’ by the IAU in 2006?
• Halley’s Comet orbits the Sun approximately once every how many years?
• Which planet is referred to as Earth’s ‘Twin’ due to similar size and mass?
• Acid rain is primarily caused by atmospheric pollution from oxides of which elements?