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How Kingdoms are Subdivided Unit A Chapter 2 Lesson 2 Pages A52-A57
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The Linnaean System The Linnaean system has seven levels of classification. The largest group is called a kingdom. At each level, an organism belongs to a group of living things with shared characteristics. If two organisms share a level of classification, they belong to the same levels above it, but not necessarily below.
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The Seven Levels of Classification Kingdom (King) Phylum (Phillip) Class (Came) Order (Over) Family (For) Genus (Great) Species (Spaghetti) Members at a lower level resemble each other in more ways than members at higher levels.
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Naming Living Things Why do scientists use scientific names? Because two different animals may be called by the same name, causing confusion. Carlolus Linnaeus developed a bi-nomial(two part) name. The scientific name is always written in Latin The first part of an organism’s name is its genus. The genus name always begins with a capital letter. A genus is a group of organisms that share major characteristics. Look Out!! Your about to have your face eaten by a mountain lion….or is it a cougar….maybe a puma? Maybe I should look this up OWWW MY FACE!
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Naming Living Things The second part of a scientific name is its species and is written with a lowercase letter. Every different kind of organism is a species. Besides being written in Latin, the names are also either underlined or in Italics. Canis lupus Canis latrans Canis familiaris The wolf, coyote and retriever. Same genus….bit of a difference.
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Dichotomous Key When observing nature, it can sometimes be difficult to recognize different species of animals. You can use a dichotomous key to identify an organism based on its characteristics. It consists of a series of choices that lead to the correct name of the organism. Dichotomous Key Game
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