Which of the following is the boiling point of water at sea level in Celsius?

The disease night blindness is caused by the deficiency of:

The gas released during photosynthesis that is essential for respiration is:

Which of the following is a non-metal that is a good conductor of electricity?

Which of the following is the primary function of white blood cells known as lymphocytes?

The process of breakdown of complex food molecules into simpler ones is called:

The chemical symbol for gold is:

Which of the following is used in thermometers to measure temperature?

Which of the following organs produces digestive enzymes as well as insulin?

The main source of atmospheric oxygen is:

The layer of skin responsible for producing melanin is: