1.
Reforestation means
2.
Migratory birds fly to far off places in a particular season of the year because that place becomes
3.
____ is the Source book which keeps a record of all the endangered animals and plants.
4.
Animals whose numbers are reducing to a level that they might face extinction are
5.
Species of plants and animals which are found exclusively in a particular area are called
6.
Variety of organisms existing on the earth, their interrelationships and their relationship with the environment is called
7.
Part of the earth which supports life where living beings exists is called ____
8.
Increased level of carbon dioxide in the atmosphere traps the heat rays reflected by the earth causing an increase in the temperature on the earth. This is
9.
Ill effect of deforestation is it
10.
Deforestation means