Taxonomy
Sponsored Links
This presentation is the property of its rightful owner.
1 / 54

Taxonomy PowerPoint PPT Presentation


  • 83 Views
  • Uploaded on
  • Presentation posted in: General

Taxonomy. The science of classifying organisms . Classify To arrange according to similarities or differences. Why classify?. Biologists use classification to organize living things into groups so that the organisms are easier to study. We classify to make our lives easier.

Download Presentation

Taxonomy

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Taxonomy

The science of classifying organisms.

Classify

To arrange according to similarities or differences.


Why classify?

Biologists use classification to organize living things into groups so that the organisms are easier to study.

We classify to make our lives easier.


History of Taxonomy


Aristotle

  • Simple classifications

  • Used common names

  • Plant or animal?

  • If an animal does it have blood?

    does it

    • Fly

    • Swim

    • Walk/Crawl


  • DISCUSSION QUESTION - Using Aristotle's 3-group system (based on movement), name 2 animals that would fit each of the 3 groups.


Problems with this system?

Some animals can walk, swim, and fly


What technology helped scientist improve the classification system?

Microscope -1600s


Carolus Linnaeus 1700s

  • Described organisms with two word names, instead of polynomials

  • Developed binomial nomenclature

  • First word = Genus name (Capitalized)

  • Second word = species name (lowercase)

    scientific name

    • Example Canis lupus

      Always italicized or underlined


Why binomial nomenclature?

  • Binomial - 2 name

  • Nomenclature – naming system

  • Much easier than a 10+ word name under old “polynomial system”

  • Same name no matter where you go (Latin)

  • Less confusion


Devil Cat


Ghost Cat


Mountain Lion


Screaming Cat


Puma


Florida Panther


Cougar


Felis concolor


Taxonomic Hierarchy

  • Names organisms and their relationships from very broad to very specific


Classification of Living Things


Milky waySolar SystemEarthU.S.OhioWestervilleMainsail Dr.283


DomainKingdomPhylumClassOrderFamilyGenusSpecies


Three Domains of Life

There used to be 2, why do you think there are 3 now?


Domain Archaeabacteria: Life's Extremists...! Archaea are found in the harshest environments on Earth, and are the oldest known organisms on Earth, appearing in the fossil record over 3.6 BILLION years ago (3,600,000,000 years ago!)


Domain Bacteria (or Eubacteria):

is familiar to most people when associated with human or animal disease. However, most bacterial species do not (and cannot) cause disease.

Most species even play beneficial roles for humans by producing antibiotics and food.


Domain Eukarya

A single-celled or multicellular organism whose cells contain a distinct membrane-bound nucleus.

(Organism’s cell has a nucleus.)


DomainKingdomPhylumClassOrderFamilyGenusSpecies


Pro = before


Why has taxonomy changed throughout history?

Do you think it will continue to change?


Prokaryotes

  • We are now filling out our charts


Archaea

  • Unicellular prokaryotes

  • Autotrophs

  • Cell wall


Eukaryotes

Eu = true

Have membrane bound nuclei


  • Most are unicellular


Phylum examples

  • Chordata Cord Chordates Hollow dorsal nervous chord, notochord, pharyngeal slits, endostyle, post-anal tail about 100,000+ Cnidaria Stinging nettle Coelenterates Nematocysts (stinging cells) about 11,000 Ctenophora Comb bearer Comb jellies Eight "comb rows" of fused cilia about 100 modern species Cycliophora Wheel carrying Symbion Circular mouth surrounded by small cilia


Classification of Humans

  • Kingdom Animalia

  • PhylumChordata

  • ClassMammalia

  • OrderPrimates

  • FamilyHominidae

  • GenusHomo

  • Speciessapiens


Is your table filled out?

Don’t lose it!!!


  • Login