The main function of red blood cells is to:

Which of the following diseases is caused by a virus?

The layer of the atmosphere where weather phenomena occur is called:

The unit used to measure electric current is:

The process of splitting a heavy atomic nucleus into smaller nuclei is called:

Which gas is used in the preparation of soft drinks to add fizz?

Which organ is primarily responsible for filtering blood and removing waste as urine?

The study of heredity and variation in living organisms is called:

The Richter scale is used to measure the intensity of:

Which of these is not a renewable source of energy?

Photosynthesis primarily takes place in which part of the plant cell?