The proportion of oxygen and carbon dioxide in the atmosphere is maint – McqOptions

MCQOPTIONS

1.	The proportion of oxygen and carbon dioxide in the atmosphere is maintained by
A.	plants.
B.	animals.
C.	machines.
D.	Both (a) and (b).
Answer» E.

Discussion

No Comment Found

Related MCQs

From which one of the following sources, the aquatic animals breathe in oxygen in the water?
Which one of the following minerals is an essential for developing strong bones and teeth?
The tap water is considered pure and fit for drinking. Pure water is tasteless but tap water has some taste. This taste in tap water is due to
Why is the presence of water vapours in air important?
A girl saw a water puddle while going to school. In the evening, while returning home, she observed that the puddle disappeared. This was because
What percentage of water is readily available to us?
If there are no rains at a place for a long time it results in
Which type of force is experienced when a south pole of a magnet is brought near the south pole of another magnet?
Your car is running in the direction of east on a straight path at constant speed of 40 kmph. What type of speed does the speed of the car represent?
Select an incorrect reason for separating components of a mixture.