They are not classified into a kingdom as they are not alive.
Virus do not show any cellular organization,so they cannot be classified as a kingdom.
Since they are not living, they are not classified and placed in a kingdom.
It is a virus, therefore it isn't alive and can't be classified into one of the kingdoms. It's just a virus.
Virus' are not living - they cannot exist outside a living organism, and therefore cannot be classified in the same way as other organisms
Virus's do not belong to a Kingdom.
Algea is classified into "Protista"(Protoctista) kingdom.
Arthropods are classified in the animal kingdom (Animalia, or Metazoa).
Mold should be classified in the fungus kingdom.
Fungi are classified in its own kingdom, not under plantae.
The elephant seal is classified in the kingdom Animalia, the same kingdom as all other animals.
Bacteria are classified in the kingdom Bacteria.
It is a virus.