Viruses depend on living things for what?
Viruses depend on living cells because they reproduce inside of them.
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.
Roughly, the basic principle is that a "living things" can reproduce through cell division and "non-living things" cannot. For example, bacteria can procreate on its own, while viruses cannot. Viruses have to come into contact with the cells of living things to have their genome duplicated and multiply.
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.
Yes, all living things depend on non-living things. For example: - A plant requires sunlight, soil and water, all non-living things. - An animal requires a habitat, so rocks, dirt, etc. which are non-living things. Even if the animal did not depend on these things, it would still need to eat other animals or plants and plants need non-living things to survive.
The smallest living things depend on how a living thing is defined. Some biologists do not believe viruses are living organisms because there are no free living forms (all are parasitic) and because they must reply on their host for reproduction. Others believe that, despite this, they have an existence of their own separate to the host and are subject to natural selection and are therefore alive. If you accept viruses are not alive, the…