Nitrogen present in…………
a) animals
b) plants
c) atmosphere
d) all of these
Oxygen required for………..
a) animals
b) plants
c) microorganisms
d) all of these
Carbon dioxide essential for……………...
a) plants
b) animals
c) both a and b
d) none of these
Atmosphere in motion is…...
a) air
b) wind
c) erosion
d) none of these
Wind cause…………………
a) soil erosion
b) damage buds
c) damages plants
d)all of these
The layer of atmosphere in which we live is called……
a) troposphere
b) mesosphere
c) stratosphere
d) thermosphere
