In biology, all living organisms are classified according to eight different categories. These are:
Domain, Kingdom, Phylum, Class, Order, Family, Genus, and Species. This can be easily remembered through the mnemonic device, Did King Phillip Come Over For Great Spaghetti. You simply take the first letter of each word and apply it to the taxonomic category. Domain is a fairly new rank in the taxonomic scale and isn\’t yet officially recognized, but is being included more and more in papers and books. With this classification system, we end up with a better understanding of what the relationship between organisms might be. If you notice one organism is from a specific family, you can guess what others might be from the same family and how they might end up classified near each other. It also allows us to see the idea of evolution in full force.
You can see where the organisms all started and where they wound up. Organization is key to science, since it helps us better understand the world around us. In order for us to expand upon our ideas in science, we need classification, which puts them in specific categories so we know immediately what they do and how they are different from other objects. Biological taxonomy, which is basically the scientific classification system that we use, is broken into eight ranks. These include Domain, Kingdom, Phylum, Class, Order, Family, Genus, and Species. An easy way to remember this is the acronym Did King Phillip Come Over For Great Spaghetti, where each category name is represented by their first letters. All living organisms are classified into groups based on very basic, shared characteristics. Organisms within each group are then further divided into smaller groups.
These smaller groups are based on more detailed similarities within each larger group. This grouping system makes it easier for scientists to study certain groups of organisms. Characteristics such as appearance, reproduction, mobility, and functionality are just a few ways in which living organisms are grouped together. These specialized groups are collectively called the classification of living things. The classification of living things includes 7 levels:, and. The most basic classification of living things is kingdoms. Currently there are. Living things are placed into certain kingdoms based on how they obtain their food, the types of cells that make up their body, and the number of cells they contain. The is the next level following kingdom in the classification of living things.
It is an attempt to find some kind of physical similarities among organisms within a kingdom. These physical similarities suggest that there is a common ancestry among those organisms in a particular phylum. Classes are way to further divide organisms of a phylum. As you could probably guess, organisms of a class have even more in common than those in an entire phylum. Humans belong to the Mammal Class because we drink milk as a baby. Organisms in each class are further broken down into orders. A taxonomy key is used to determine to which order an organism belongs. A taxonomy key is nothing more than a checklist of characteristics that determines how organisms are grouped together. Orders are divided into families. Organisms within a family have more in common than with organisms in any classification level above it.
Because they share so much in common, organisms of a family are said to be related to each other. Humans are in the Hominidae Family. Genus is a way to describe the generic name for an organism. The genus classification is very specific so there are fewer organisms within each one. For this reason there are a lot of different genera among both animals and plants. When using taxonomy to name an organism, the genus is used to determine the first part of its two-part name. Species are as specific as you can get. It is the lowest and most strict level of classification of living things. The main criterion for an organism to be placed in a particular species is the ability to breed with other organisms of that same species. The species of an organism determines the second part of its two-part name.