Which blood type is known as the universal donor for blood transfusions?

Which kidney process selectively returns useful substances like glucose back to the bloodstream?

Which common preventive health practice helps reduce the transmission of airborne respiratory infections?

Which part of the human brain regulates vital involuntary functions such as breathing and heartbeat?

Which muscle separates the chest cavity from the abdominal cavity and assists in breathing?

Which type of immunity is gained through vaccination by introducing a weakened or inactivated pathogen?

Which substance in a catalytic converter helps reduce harmful vehicle exhaust emissions?

Which everyday application demonstrates the use of static electricity?

Which simple machine is used in a pair of scissors?

Which vitamin deficiency causes pellagra characterised by dermatitis diarrhoea and dementia?

Which everyday material acts as a natural antibacterial due to its low water activity and acidic pH?