There is always a cycle of CO2 running in the atmosphere due to which the concentration of CO2 remains constant in the atmosphere. Choose the correct sequence of this cycle:

You must have observed that during the winters sometimesit becomes quite difficult to see even the objects short distance apart. This low visibility during the cold weather is due to:

The ‘water pollution’ can be defined in several ways. Which of the following statements does not give the correct definition?

A cool breeze after a hot day brings all of us considerable relief. This breeze is actually the moving air. What is the basic process that causes this movement of air?

If the carbon dioxide content in the atmosphere is increased then which one of the following would not get affected?

The nitrogen molecules present in air can be converted into nitrates by:

Top soil is the best for the vegetation. The main components ofthis productive top layer are:

The process of nitrogen fixation by bacteria does not take place in the presence of:

Weeds are the unwanted plants that grow along with the cultivated plants. How do they affect the crop plants?

Growing different crops in the same field in a pre-planned succession, to improve the quality and quantity of the crop yield and maintain the fertility of soil is known as:

Drones” in the honeybee colony are stingless and are unable to gather food. Their main role is to mate with queen bee and help in breeding.
Drones are born out from:

Find out the wrong statement among the following:

Which of the following is a fungus disease causing maximum deaths of poultry birds?

What is true about scalar quantities?

A body whose position with respect to surrounding does not change is said to be in a state of: