Classification System

Dichotomous Key

with Harry Potter

Crayfish

Catfish

Silverfish

Taxonomy: classifying organisms & giving them a universally accepted name

Lets classify some goblins!

Classifying both living and nonliving things,

so that we better understand the world around us

Carolus Linnaeus

Botanist & Father of taxonomygave them all Latin names

Came up with the system in the 1700s that is still used today

Organisms are classified by their:* physical structure (how they look)* evolutionary relationships (phylogeny)* genetic similarities (DNA)

* biochemical similarities

Binomial nomenclature: each species is assigned a two-part scientific nameTwo-part: Genus & Species Genius!

!

Scientific name is always written in italics First letter in the first word is

CAPITALIZED Second is lowercased

Ursus arctos Ursus maritimus

Hierarchical classification:Broad specific

KingdomPhylum

ClassOrder

Family Genus

Species Binomial name

HogwartsHouses: Slytherin, Hufflepuff, Ravenclaw, GryffindorYear: 1st, 2nd, 3rd, etc.

Student: Harry, Ron, Hermione

Dichotomous Keys use Taxonomy to identify the species name by the organisms physical attributes

A step-by-step guide to identify an organismEach step gives a choice of two descriptions. The descriptions have to be opposites

Ex. Leaves round vs. leaves not round

Check out my moon walk

8 goblins

Why would we want to classify these goblins?

A. The classification has changed since Linnaeus’s time with new evolutionary findings

B. At 1st living organisms were classified as either plant or animal, today there are more precise classifications producing 6 main Kingdoms based on cell structure, # of cells, how they get their food & movement1. Eubacteria2.Archaebacteria3. Protista4. Fungi5. Plantae6. Animalia

A. Domain is larger than a Kingdom & separates the kingdoms into major groups1. Eukarya - protists, fungi, plants & animals 2. Bacteria – eubacteria3. Archaea - archaebacteria

Prokaryotic single celled organisms that are heterotrophs (can not make own food) some can be autotrophs (make own food)

Found everywhere

Prokaryotic single celled organisms that are heterotrophs while some can be autotrophs

Found only in extreme conditions hot springs, salt brines, ocean vents

Eukaryotic single celled organism that either be autotrophic or heterotrophic

There are Plant-like, Animal-like & Fungi-like

Eukaryotic usually multicellular heterotrophs with cell walls that consume decaying matterFew are unicellular bread molds

Eukaryotic multicellular autotroph (photosynthesis) organisms with cell walls

Eukaryotic multicellular heterotrophs with no cell walls