In fire flies the flashes are profuced due to the slow combustion of a protein luciferin in air and moisture. The phenomenon is known as

Write a note on the air pollution caused due to combustion

Self - fertilisation is possible in earthworm due to phenomenon known as

Fill in the blanks The slow process of decay or destruction of a metal due to effect of air, moisture and acids on it is known as......

A beam of light passing from one transparent me dium to another obliquely, undergoes an abrupt change in direction. This phenomenon is known as refraction of light.Draw a figure, which shows refraction through a parallel sided glass slab (Ray passing from air)

Grapes immersed in a strong solution of sugar shrink. This is due to a phenomenon known as …………………………..

Plants are known as purifier of air due to the process of