Why are living organisms classified

Living organisms are classified because of the following reasons 1. Due to a large variety of life forms on earth, it becomes difficult to study each of the species, thus scientists classify these species into larger groups, wherein by studying a group, we can deduce the characteristics of all the species. Hence living organisms are classified for the ease of studying them. 2. Classifying organisms into groups and sub-groups may also aid in establishing evolutionary relationships between them.

There are several levels of groups in the classification system. The highest-level groups are the largest and the most general. They contain a wide variety of living things. Those large groups are divided into smaller groups of similar organisms. The smaller groups are then split into even smaller groups, which contain organisms with even more similar features, and so on. Genera, or genuses, are the next-to-lowest groups in the classification system. They contain organisms that are very closely related. The lowest-level groups are the species. Members of a species have many common traits, and they can produce offspring of the same species. The Five-Kingdom System Scientists have been classifying living things for hundreds of years. Over time, the classification system has changed. For many years, five kingdoms made up the highest-level groups of organisms. The first kingdom is called Monera. Monerans have only one The second kingdom is called Protista. Most The third kingdom is Fungi. Most fungi have many cells arranged in threadlike groups. The fourth kingdom is Plantae. The fifth and largest kingdom is Animalia. Like fungi and plants, The Three-Domain System In the late 1970s one scientist discovered that all the organisms in the Monera kingdom did not belong in the same category. He suggested that, instead of five kingdoms, living things should be grouped into three domains. In this system, the domains make up the highest level of groups. Kingdoms make up the level belo...

By assigning each group of organisms to a kingdom, phylum, class, family, genus, and species, they can then be uniquely characterized. Their membership in a group tells us about the traits they share with other members of the group, or the traits that make them unique when compared to organisms in groups to which they do not belong. • classification - the systematic grouping and naming of organisms based on shared structural similarities, functional similarities, or evolutionary history • taxonomy - the science of classifying organisms (describing, naming, and categorizing organisms) • systematics - the study of the diversity of life and the relationships between organisms • phenetics - a method of classifying organisms that is based on their overall similarity in physical characteristics or other observable traits (it does not take phylogeny into account) • cladistics - a method of analysis (genetic analysis, biochemical analysis, morphological analysis) that determines relationships between organisms that are based solely on their evolutionary history In general, Linnaean taxonomy uses phenetics to classify organisms. This means it relies on physical characteristics or other observable traits to classify organisms and does consider the evolutionary history of those organisms. But keep in mind that similar physical characteristics are often the product of shared evolutionary history, so Linnaean taxonomy (or phenetics) sometimes reflects the evolutionary background of a g...

This world is filled with various kinds of living organisms. But this big complex living world with such diversity is as much a big and difficult task to study as it is interesting. For a proper scientific understanding of their differences and similarities and their typical attributes, there needs to be an organizational system in place that makes it easier for a scientific study. Plus, there is an incredibly high possibility that a particular type of organism is known differently at different places owing to different cultural aspects around the area. Therefore, to avoid such huge factors of confusion and to understand the different properties of the physical and genetic qualities of living organisms, a categorical classification of Classification of Living Organisms Humans beings share a very close evolutionary relationship and are descendants of monkeys. But this close relationship does not exist between a human being and a cow or cat for that matter. So the typical behavior and development of the biology in a monkey and a human being will be more similar but will be more different with respect to the cow. Such issues of scientific reasoning will fall into trouble when an attempt is made to study the diverse types of living organisms and their wide variety of characteristics. Hence, as mentioned above, the justification for why is it important to classify living organisms stands valid from this point of view as well. To understand the huge life around us, and to unders...

Different types of microscope Originally Linnaeus's system relied purely on human judgement in order to compare the characteristics of various organisms. The development of microscopes allowed cells to be examined in far more detail. Organelles within the individual cells could be distinguished and this allowed a more scientific approach of classification. The development and study of biochemistry and the processes undertaken inside the cells, in some cases, have allowed any ambiguities within this classification system to be clarified. The comparisons of DNA sequences have allowed the relationship of organisms to be explored further. In some cases, species that are more closely related may have fewer differences contained within the DNA sequences. DNA sequences can highlight the differences and similarities between species from the DNA molecules they share Three-domain system Classification systems have continued to be developed by other scientists, such as Carl Woese who developed the three-domain system. This is based on evidence now available from chemical analysis. The updated system divides organisms into: • Archaea (primitive bacteria usually living in extreme environments) • Bacteria (true bacteria) • Eukaryota (including protists, fungi, plants and animals) Evolutionary trees Evolutionary trees are a method used by scientists to represent the relationships between a set of organisms. The tips of the tree often represent different species and where two branches joi...

Total numbers of organisms already discovered are about 8.7 millions. Among them 6.5 millions are terrestrial and 2.2 millions are aquatic.The largest group of organisms are arthropods, contains about 75% of the total animal community. Discovery of living organisms every year is a continuous process. Every year almost 15000 new species are discovered. It is estimated that total living organisms including terrestrial, aquatic and aerial are ranges between 5 to 30 million species. We all know that two thirds of entire earth is consists of water. It includes huge oceans, seas, rivers, lakes etc. Many portion of the aquatic area are still undiscovered. As the depth of oceans and some seas are very high and shallow area donot allow sunlight to enter and touch the floor of the sea and oceans. As a result it becomes quite difficult to go there and observe the biosphere. Not only oceans but in some tropical rain forest are also there , where identification and study of different organisms are tough due to adverse weather. About 50 to 100 times more species have been extinct due to bad weather, insufficiency of food, or improper living place. Even according to Darwin’s “survival of the fittest “indicate there is always competition between the two species of same habitants. Winner will be accepted by the nature. Besides this if a community is unable to adjust itself with changes of environment will be extinct automatically in nature. So, for identification of new and extinct organis...

Classification of organisms: • Organisms are classified into different groups in order to identify any specific organisms. • Classification of organisms helps scientists to study them and undertake research on them. • Classification also helps us in understanding each individual organisms and their differences and similarities with other organisms and it also helps us to understand the evolutionary process in a better way. • It enables us to understand how complex organisms evolve from simpler organisms. • Classification is a tool which helps us to deal with a great diversity of living forms. • It is essential to understand the inter-relationships among the different groups of organisms. • Classification forms a base for the development of other biological sciences.