Which organism is popularly referred to as ‘Farmer’s friend’?

Complete the reaction:

Calcium hydroxide + carbon dioxide → _________ + water

When there is a cut in your finger, excessive blood loss is prevented by clotting of blood helped by ___________.

The increasing amount of carbon dioxide in the air is slowly raising, the temperture of the atmosphere, because it absorbs

Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?

Respiration is

Eyes of potato are useful for

Lac, which is used as sealing wax is produced by