NEET BIOLOGY

Detailed explanation-1: -It doesn’t have any cells. Virus characteristics don’t match with any of the kingdoms in the three domain classification system. So viruses are not included in this classification. Viruses cannot perform any metabolic function and they don’t have any organelle and they cannot respire.

Detailed explanation-2: -Viruses are the smallest biological particle (the tiniest are only 20 nm in diameter). However, they are not biological organisms so they are not classified in any kingdom of living things. They do not have any organelles and cannot respire or perform metabolic functions.

Detailed explanation-3: -Viruses:Viruses did not find a place in classification since they do not have a cell structure and are not true living beings. Viruses are noncellular, obligate, intracellular parasites.

Detailed explanation-4: -Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things.

Detailed explanation-5: -Viruses are not made out of cells, they can’t keep themselves in a stable state, they don’t grow, and they can’t make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.