11.
A river with high BOD value is

12.
The name given to a liquid drop of dew that freezes when the air temperature drops below freezing is:

13.
"Ozone Hole" is a _____________

14.
The maintenance of relatively constant internal environment is called

15.
The only ape found in India

16.
The indoor pollutant radon which is a radioactive gas causes

17.
Hypothermia is most common in:

18.
The earth is tilted at an angle of 23.5o with respect to the plane of its orbit around the sun. If the amount of tilt were increased to 40o, we would expect in middle latitudes:

19.
Which of the following is correctly matched?

20.
Flora is the __________ life occurring in a particular region or time