Which simple machine uses a grooved wheel and rope to lift heavy objects with reduced effort?

Which part of the human ear is primarily responsible for maintaining balance?

Which blood vessels carry oxygenated blood away from the heart to the rest of the body?

Which gas do plants primarily absorb during photosynthesis?

Which mineral deficiency is commonly associated with goiter due to impaired thyroid hormone production?

Which simple machine is used in a pair of scissors?