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virion
mycoplasma
viroids
prions
Smooth muscles are likely to be found in
Snakes and lizards are animals that are
Soilless agriculture refers to
Solar energy is converted into chemical energy during:
Some body organs may be transplanted when a person is
Some of the conifers in our northern areas include
Some of the mineral elements required in extremely small quantities (traces) are called microelements. Group of such elements are
Some vertebrae in birds fuse to form
Some viruses have RNA but no DNA. This would indicate that
Source of infection in diseases like Tuberculosis, Mumps and Whooping cough is