Question

Match column I with column II and select the correct answer using the codes given below :

Answer 1

Green plants are called produces because they not only manufacture food
for themselves but also for the rest of members of biotic community.
Primary carnivores are called secondary consumers because they feed on
first order or primary consumers (herbivores). Flow of energy in
ecosystem is unidirectional from sun to plants, plants to animals,
animals to animals, organic remains to decomposers and dissipation as
heat. Ozone (O${}_3$) is a triatomic molecule made up of three atoms of
oxygen. Chloroflurocarbons (CFCs) are ozone depleting substances which
are highly stable, odourless, synthetic gaseous substances used as
aerosol propellants, coolants, refrigerants, etc.