algae
bacteria
virus
fungus
Radiations which is not emitted during radioactivity is:
Radiocarbon dating technique is used to estimate the age of
Raw materials used for the manufacture of glass are
Rayon is chemically
Rayon is chemically a
Red data book gives information about species which are
Red light is used in traffic signals, because
Refrigeration is a process which
Refrigerator Protects the food from contamination because -
Removal of carbon particles from air involves the principle of
