why are viruses such a difficult group to classify
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Why aren't viruses classified into a kingdom? It is difficult to classify viruses as living organisms because they are not made of cells. They only become alive when they find a host i.e. a living cell to live in.ome algae are difficult to classify because they sometimes do not properly fit in one of the kingdoms since they may have characteristics from a few of the kingdoms.
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Which kingdom do viruses belong to? Viruses are not classified into any of the kingdoms because they cannot live outside of a host cell (they depend on the host cell's DNA to reproduce and undergo metabolic reac … tions within it).
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Goal 4 - Viruses, Bacteria, Protists and Fungi Notes Named after the tissues they infect. For example, Adenoviruses cause common cold found in the adenoids tissues between the back of the throat and the nasal cavity. Today viruses are given a genus name ending in the word virus and a species name. If a virus affects bacteria it is called a bacteriophage or phage. HIV - RNA virus called retrovirus. HIV in a human host affects white blood cells. People with HIV eventually will get AIDS because more white blood cells become infected and produce new viruses.
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Why virus also considered non-living thing? Some consider them non-living as they do not meet all the criteria used in the common definitions of life. For example, unlike most organisms, viruses do not have cells. However, viruses have genes and evolve by natural selection. Virus do not meet two essential criteria to be considered as living - 1.ll life is cellular by definition. Viruses do not have cells and thus cannot be classified under the broad spectrum of what constitutes life. Although they cannot live outside of a host for any period of time, this is not the reason why they are considered non-living. Fregaille · 7 years ago. Thumbs up.
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- Viruses have evolved to infect every form of life, from animal to plant and from fungi to bacteria. However, viruses tend to be somewhat picky about what type of cells they infect. Plant viruses are not equipped to infect animal cells, for example, though a certain plant virus could infect a number of related plants.
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- Classification of Viruses. Viruses are not usually classified into conventional taxonomic groups but are usually grouped according to such properties as size, the type of nucleic acid they contain, the structure of the capsid and the number of protein subunits in it, host species, and immunological characteristics.aliciviridae, Picornaviridae, Reoviridae. Genera have the suffix-virus. Within the Picornaviridae there are 5 genera: enterovirus, cardiovirus, rhinovirus, apthovirus and hepatovirus. The definition of ` species ' is the most important but difficult assignment to make with viruses.
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- Viruses are prokaryotes and not Eukaryotes. Therefore they are not alive. Since it is not considered to be alive they do not belong in the 5 kingdom classification; Monera, Fu … ngi, Plantae, Animalia, Protista. Bacteria are living once celled organisms and belong to either bacteria or Archaea. *Viruses not considered alive because they need a host to be able to reproduce.
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- The Nature of Viruses Viral Structure All viruses have the same basic struc-ture: a core of nucleic acid surroundedby protein. Individual viruses containonly a single type of nucleic acid, eitherDNA or RNA.The DNA or RNAgenome may be linear or circular, andsingle-stranded or double-stranded.Viruses are frequently classified by thenature of their genomes. RNA-basedviruses are known as retroviruses.he first virus to be isolatedproved to consist of two chemicals, one a protein and theother a nucleic acid. The Nature of Viruses. Viruses occur in all organisms.Able to reproduce only within living cells, viruses are notthemselves alive.
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Virus Photo by: Irochka. A virus is a small, infectious agent that is made up of a core of genetic material surrounded by a shell of protein. The genetic material (which is responsible for carrying forward hereditary traits from parent cells to offspring) may be either deoxyribonucleic acid (DNA) or ribonucleic acid (RNA).ype C viruses are the least common type of influenza virus and cause irregular and milder infections. An important characteristic of all three kinds of influenza viruses is that they frequently mutate. Because they contain only a small amount of genetic material, flu viruses mutate frequently.
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Virus A primary reason is that viruses do not possess a cell membrane or metabolise on their own - characteristics of all living organisms. Examples of common human diseases caused by viruses include the common cold, the flu, chickenpox and cold sores.
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Are Viruses Alive? The categorization of viruses as nonliving during much of the modern era of biological science has had an unintended consequence: it has led most researchers to ignore viruses in the study of evolution. Finally, however, scientists are beginning to appreciate viruses as fundamental players in the history of life. Coming to Terms It is easy to see why viruses have been diffi cult to pigeonhole. They seem to vary with each lens applied to examine them.
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- Four characteristics were to be used for the classification of all viruses: 1  Type of the nucleic acid including size of the genome, strandedness (single or double), linear or circular, positive or negative (sense), segments (number and size), sequence and G+C content etc.our characteristics were to be used for the classification of all viruses: 1  Type of the nucleic acid including size of the genome, strandedness (single or double), linear or circular, positive or negative (sense), segments (number and size), sequence and G+C content etc.
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Structure of a Virus The size majority of viruses range between 10 to 300 nanometers. The structure of a virus cell, known as a virion (as discussed above, viruses do not have a cellular structure) is quite interesting to study.A single virion is composed of an outer coat of protein, which is called capsid, enclosing nucleic acid within it.hether a virus is a proper life form or organism is a topic of much debate. There are several reasons behind such contradictory opinions. Although viruses have genes and undergo evolution by natural selection, they do not reproduce by cell division as they do not possess a cellular structure.
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RNA virus Viruses with RNA as their genetic material but that include DNA intermediates in their replication cycle are called retroviruses, and comprise Group VI of the Baltimore classification. Notable human retroviruses include HIV-1 and HIV-2, the cause of the disease AIDS.n RNA virus is a virus that has RNA (ribonucleic acid) as its genetic material.
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Marine life However they lack key characteristics (such as cell structure) that are generally considered necessary to count as life. Because they possess some but not all such qualities, viruses have been described as organisms at the edge of life, and as replicators.
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- Viruses do not fall under any domain. They are neither prokaryotes nor eukaryotes. They are not considered a part of the classical living world (or the domains of life).
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GCSE Biology/Classification of Organisms Accurate Classification [edit]. Often organisms are hard to classify. For example, the duck-billed platypus is homeothermic, has lungs and provides milk for the young. These are the classic features of mammals, yet the platypus also is oviparous.This is not a feature of mammals, as mammals are the only viviparous class of animal.ccurate Classification [edit]. Often organisms are hard to classify. For example, the duck-billed platypus is homeothermic, has lungs and provides milk for the young. These are the classic features of mammals, yet the platypus also is oviparous.
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To which kingdom do viruses belong? Viruses are unique in that they have been classified as both living and nonliving at various points in the history of Biology. In other words, a virus is a small infectious agent that can replicate only inside the living cells of organisms. Viruses infect all types of organisms, from animals and plants.iruses are not considered true living things, therefore they are not classified under any of the kingdoms. The only living part is the DNA, but it requires a host cell to carry out all necessary life functions.
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-   A virus isn't put into one of the 5 kingdoms because they cannot reproduce without a host cell. The five kingdoms are for living things and a virus isn't living since it … doesn't reproduce.
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RNA virus The ICTV classifies RNA viruses as those that belong to Group III, Group IV or Group V of the Baltimore classification system of classifying viruses and does not consider viruses with DNA intermediates in their life cycle as RNA viruses.his nucleic acid is usually single-stranded RNA (ssRNA) but may be double-stranded RNA (dsRNA). Notable human diseases caused by RNA viruses include Ebola hemorrhoragic fever, SARS, influenza, hepatitis C, West Nile fever, polio, and measles.
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- Viruses are similar to living organisms because both contain  hereditary material (RNA or DNA), and both reproduce. Viruses are  different from living organisms because they … do not use energy to  grow, and do not use energy to respond to their surroundings.iruses do not behave like other living cells. For one, they can only reproduce within other organisms. And essentially that is about all they do. Granted there are negative r … eprocussions for the host organism, but the virus itself simply multiplies.
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What Are Viruses? A virus particle, also known as a virion, is essentially a nucleic acid (DNA or RNA) enclosed in a protein shell or coat. Viruses are extremely small, approximately 20 - 400 nanometers in diameter. The largest virus, known as the Mimivirus, can measure up to 500 nanometers in diameter.By comparison, a human red blood cell is around 6,000 to 8,000 nanometers in diameter. In addition to varying sizes, viruses also have a variety of shapes.iruses are unique in that they have been classified as both living and nonliving at various points in the history of biology. Viruses are particles that are capable of causing a number of diseases including cancer. They not only infect humans and animals, but plants and bacteria as well.
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- Viruses are capsules with genetic material inside. They are very tiny, much smaller than bacteria. Viruses cause familiar infectious diseases such as the common cold, flu and warts. They also cause severe illnesses such as HIV/AIDS, smallpox and hemorrhagic fevers. Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves. This eventually kills the cells, which can make you sick. Viral infections are hard to treat because viruses live inside your body's cells. They are protected from medicines, which usually move through your bloodstream. Antibiotics do not work for viral infections.
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Microbiology Viruses are submicroscopic entities capable of causing disease. They are a piece of nucleic acid (genetic material) surrounded by a protein coat. Once inside the plant cell, the nucleic acid portion directs the plant cell to produce more virus nucleic acid and virus protein, disrupting the normal activity of the cell.iruses are submicroscopic entities capable of causing disease. They are a piece of nucleic acid (genetic material) surrounded by a protein coat. Once inside the plant cell, the nucleic acid portion directs the plant cell to produce more virus nucleic acid and virus protein, disrupting the normal activity of the cell.
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Virus All viruses contain either RNA or DNA surrounded by a protective protein shell called a capsid. The genetic material in a virus may take one of four forms: a double strand of DNA, a single strand of DNA, a double strand of RNA, or a single strand of RNA. The size of the genetic material of viruses is often quite small.ype C viruses are the least common type of influenza virus and cause irregular and milder infections. An important characteristic of all three kinds of influenza viruses is that they frequently mutate. Because they contain only a small amount of genetic material, flu viruses mutate frequently.
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Biology/ Are Viruses Alive term paper 17253 Over the years, scientists have debated whether viruses are alive. Some scientists argue that the virus is lifeless. On the other hand, other scientists argue that viruses are lifeforms and should be classified into a kingdom.However, many sci-entists have agreed that things must have seven characteristics of life to be considered alive.ome scientists argue that the virus is lifeless. On the other hand, other scientists argue that viruses are lifeforms and should be classified into a kingdom. However, many sci-entists have agreed that things must have seven characteristics of life to be considered alive.