why are viruses considered to be nonliving?
Viruses are not made up of living cells, while living things (such as plants and animals) are made up out of living cells. Viruses are called acellular particles and they consist of a central core containing either DNA or RNA, which is surrounded by a coating of protein. Since viruses are not made up out of living cells, we consider viruses to be nonliving.
Moreover, viruses also lack properties of living things (such as plants and animals).
- No energy metabolism
- No growth
- No waste products
- No response to stimuli
- No independent reproduction (viruses replicate by invading living cells)