11.
_______ is a cold desert in India.

12.
Dodo is

13.
Blue whale is placed under

14.
What is edge species?

15.
The effects of radioactive pollutants depends upon

16.
Ecology deals with the study of:

17.
Light energy is transformed into chemical energy by

18.
How do red and blue light differ?

19.
Incineration of Municipal waste involves

20.
The 3 R principle in waste management involves