How Kingdoms are Subdivided Unit A Chapter 2 Lesson 2 Pages A52-A57.

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How Kingdoms are Subdivided Unit A Chapter 2 Lesson 2 Pages A52-A57

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.

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.

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!

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.

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