Which gas is commonly used in balloons to make them float?

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

Which blood condition results from a deficiency of red blood cells or hemoglobin leading to fatigue and weakness?

Which everyday hygiene practice is most effective in preventing the spread of common cold and flu viruses?

Which continent is known as the driest inhabited continent on Earth?

Which part of the nervous system is called the automatic system and controls involuntary body functions like digestion?

Which process in plants involves losing water vapour through stomata helping in cooling and nutrient transport?

Which common household item works based on the principle of Pascal's law?

Which part of the water cycle involves water falling from clouds back to the Earth's surface as rain snow or hail?

Which warm-blooded animal group nourishes its young with milk and typically gives birth to live young?

Which chamber of the heart pumps oxygenated blood out to the rest of the body?