Finding Order In Diversity

Key Question: How are living things organized for study?

The Tree of Life!!!

Objectives

SWBAT Explain how living things are organized for study.

Key Points1. To Study the diversity of life, biologists use a classification system to name organisms and group them in a logical manner.

2.  In binomial nomenclature, each species is assigned a two part scientific name.

3.  Linnaeus's Hierarchical system of classification includes 7 levels.  They are from smallest to largest and include species, genus, family, order, class, phylum, kingdom.

Major Vocabulary

Taxonomy : discipline of classifying organisms and assigning each organism a

universally accepted name.

Binomial Nomenclature : classification system in which each species is assigned a 2

part scientific name.

Taxon : group or level of organization into which organisms can be classified.

Why do we classify???

When you think of a fish, what characteristics do you think of???

FinsGills

Streamline shapeBones

Biologists needed to attempt to give order to the vast number of organisms on earth. This is

called Taxonomy.

Scientific NamesThere is a problem with only naming organisms

by their common names.

What is the name of this organism?

Cougar

Puma

Panther

Mountain Lion

Why is this a problem???

Binomial Nomenclature

Common Name : Grizzly Bear

Scientific Name : Ursus arctos

Rule for Binomial Nomenclature:

First name: Genus and is always Capitalized.

Second name: Species and is not capitalized.

Binomial Nomenclature

Common Name : Grizzly Bear

Scientific Name : Ursus arctosCommon Name : Polar BearScientific Name : Ursus maritimus

Do Ursus arctos and Ursus maritimus belong to the same species or same genus?

Which group, genus or species is most inclusive?

Linnaeus’s System of

ClassificationOrganisms are grouped by more than 2 name.

Every organisms actually has 7 names!!!

Each name represents a different level of organization, or taxon.

Linnaeus’s System of

Classification

Species

GenusFamily

Order

ClassPhylum

Kingdom Most inclusive

Least inclusive

Remember it by...

King Phillip Came Over For Good Soup

PantherNomenclature