Presence of nucleic acid.
Virology is the study of viruses and their evolution, structure, classification. It also is complexes of nuclies acids and proteins that help all living cells.
Bacteria are able to reproduce on their own while viruses need a host to "hijack" so they can reproduce. Bacteria have metabolisms, catabolic and anabolic biochemical reactions going on in their cells all the time. Viruses do not. Bacteria can grow in size to a certain extent while viruses do not change in this regard. The definition of living things classify bacteria as a living thing, while viruses are not.
A virologist studies viruses and their potential uses.
Biologists consider dormant virions to be non-living because they must obtain a host to function and replicate themselves. However, active viruses are considered to be living, by most scientists.
Viruses in general are somewhere on the border of "living" and "non-living" - they have some characteristics of living beings (notably, they can reproduce), but they lack others (such as a metabolism).
Viruses are neither prokaryotes nor eukaryotes as they are not living cells and do not have cell structure. They are parasites of living cells.
Bacteria and viruses are small and can only be seen through a microscope. The small living things are microorganisms or microbes. Some people do not think viruses are living things because they are acellular particles. They consider them to be an organic structure that interacts with living organisms.
Living organisms have a cell membrane containing cytoplasm. Some viruses are the exception, being made of proteins, but many types of viruses are surrounded by a lipid membrane.
Nucleic acid
Virology is the study of viruses and their evolution, structure, classification. It also is complexes of nuclies acids and proteins that help all living cells.
because they gain the 7 characteristics only when they enter a body and they don't have a proper cell structure.
Plasma membrane is a living structure because it performs many functions similar to living cells. For example - compartmentalization transport signal transduction enzyme catalysis organization of enzymes
viruses are non living and bacteria are living organisms
viruses do not grow, and viruses do not respond to changes in their environment. Therefore, viruses are not living organisms. All living things reproduce, but Viruses need living cells to reproduce because Viruses cannot reproduce by themselves.
There actually living
A disease can be biotic or abiotic. If it is a bacteria it is biotic, but if it is a virus it is always abiotic, because viruses are not considered living because they cannot reproduce on there own, do not consume energy or give off waist.
Viruses depend on living cells because they reproduce inside of them.