• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Five Kindom vs Three domain classification

Extracts from this document...


Compare and contrast the Five kingdom and Three domain classification Biological classification or scientific classification in biology is a method by which biologists group and categorize species of organisms, this practice and science of classification is called Taxonomy. The classifications of taxonomy are life, domain, kingdom, phylum, class, order, family, genus, and species. The five kingdoms and the three domains are examples of classification systems. From the late 1960's, organisms had been classified according to a five kingdom system, until the three domains system was developed by Carl woese in 1990. In this essay I am going to be comparing and contrasting these two classification systems and ultimately explaining why the three domain classification system is used. The give kingdom system In biological taxonomy, a kingdom is the highest taxonomic rank (pre 1990). There are five kingdoms; Protista (the single-celled eukaryotes); Fungi (fungus and related organisms); Plantae (the plants); Animalia (the animals); Monera (the prokaryotes).. ...read more.


Animals acquire nutrients by ingestion. There are currently 10,000 species of monera, 250,000 species of protista, 100,000 species of kingdom fungi, and 250,000 species of kingdom plantae. We can determine what kingdoms organisms belong to using the following mini-key: * 1. Is it green or does it have green parts? o Yes - go to 2 o No - go to 3 * 2. Could be a plant or a protist, or blue-green bacteria. Make sure that the green is really part of the organism, though. An animal might have eaten something green, for example. o Single-celled? go to 6 o Multicellular? Plantae. Look for cell walls, internal structure. In the compound microscope you might be able to see chloroplasts. * 3. Could be a moneran (bacteria), protist, fungus, or animal. o Single-celled - go to 4 o Multicellular (Look for complex or branching structure, appendages) - go to 5 * 4. ...read more.


It also divides prokaryotes into two groups called Eubacteria and Archaebacteria. Woese argued that, on the basis of differences in 16S rRNA genes, these two groups and the eukaryotes each arose separately from an ancestor. Using molecular data, he saw that the there are two types of prokaryotes, one that is bacteria, and another that is different to bacteria- the archaea. Each of the three cell types have a specialty or a role. Bacteria tends to be the most prolific reproducers, Archaeans tend to adapt quickly to extreme environments, And Eukaryotes are the most flexible with regard to forming cooperative colonies. The picture below shows the three domains: So to conclude Woese used molecular data to classify organisms and he saw that single celled organisms were very different from bacteria, therefore he proposed the archaea, the five kingdom system couldn't accommodate for this therefore he added a level above kingdoms ;domains, to include bacteria,( which are prokaryotes that are truly bacteria), Archaea (that are prokaryotes but are different to bacteria) and Eukarya (organisms with a nuclei in their cell) ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Genetics, Evolution & Biodiversity section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Here's what a teacher thought of this essay

4 star(s)

This is a well researched and written report.
1. Information sources need to be referenced.
2. Images should be discussed.
3. Good practice involves including examples.

Marked by teacher Luke Smithen 23/07/2013

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Genetics, Evolution & Biodiversity essays

  1. Marked by a teacher

    Nature vs. Nurture - And its affect on intelligence, personality, and behavior

    4 star(s)

    This could be for a number of reasons. One of these many reasons could be that nature, relating to genes, plays an important role on the intelligence of a person. Identical twins (share the same genes) and fraternal twins (sharing half of the same genes)

  2. Edexcel Level 3 Extended Project - Should Embyonic Stem Cell Research be applied to ...

    LAW AND POLITICS When there is any discussion about stem cell research and politics, the one example that immediately springs to mind is Bush and Obama. In 2006, 5 years after his election, ex-President George Bush vetoed a bill that would have allowed more federal funding put into embryonic stem cell research.

  1. Nature vs nurture

    It is also believed that our behavioral aspects originate only from the environmental factors of our upbringing. According to a study by Staudinger and Kunzmann (2005), "personality does not simply passively unfold as a consequence of the prewired maturational programs or the mechanistic reaction to environmental stimuli."

  2. microbiology ph and temperature effect on bacterial culture

    From here we are able to measure the absorbance of the bacteria at each bottle. This produced was same applied to the bacteria of micrococcus luteus. The cloudiness that caused in the culture is the bacteria suspended in nutrient broth.

  1. Comparing Mitosis and Meiosis with reference to i. Chromosomesii. Biological significance

    Mitosis is the means by which this is achieved. 3. Asexual reproduction If a species is good at colonizing a habitat, there might be no point, in producing offspring which are different from the parents, because they might be less effective at survival.

  2. List areas of science that have raised ethical or moral issues

    The possibility of immune system being trigged is a potential risk against the effectiveness of this treatment, moreover, immune system enhanced response to foreign object that it has seen before makes it difficult to repeat treatments > Most common diseases are high blood pressure, heart attacks or Alzheimer's are caused by combined effects of various genes.

  1. Regulation of gene expression in prokaryotes and eukaryotes.

    operator, thus inhibiting gene transcription, and preventing unnecessary energy-loss by forming enzymes for the production of amino acids readily available. This is an example of tryptophan acting as a corepressor with the trp repressor to inhibit its own synthesis by end product inhibition.

  2. The purpose of this experiment is to identify plant pigments by separation, using thin ...

    Keep on adding grass, ethanol and sand until you get a dye 8. After you get the plant dye, pour it in to the test tube. 9. Add 4cm3 of Hexane- diethyl ether- propanone solvent and shake thoroughly, then leave it to stand for 10 minutes 10.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work