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

The main function of red blood cells is to:

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

Which of the following diseases is caused by a virus?

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

The unit used to measure electric current is:

The Richter scale is used to measure the intensity of:

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

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

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

Which of the following is used as a moderator in nuclear reactors?