• 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...

Introduction

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.

Middle

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.

Conclusion

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. Marked by a teacher

    Mitosis and Meiosis, the defining differences.

    4 star(s)

    Anaphase is also a brief stage. The Centromere's holding each pair of chromatids divide, and the free chromatids move to the poles, Centromere first. The contraction this movement induces on the spindle fibres causes the chromatids to disintegrate. Now the chromatids have reached the poles, the stage of telephase begins.

  1. 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.

  2. microbiology ph and temperature effect on bacterial culture

    This means that more light is absorbed by the culture since there are more cells in the culture. To measure the light absorbance by using bacteria cultures a colorimeter is used. The colorimeter is standardised to a reading of zero absorbance with a nutrient broth that doesn't contain any living bacteria.

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

    By inserting human DNA in pigs heart could provide stronger hearts for human heart disease * Cloning could be used to help infertile parents have children * With cloning technology, plastic surgery in which foreign objects are used, for example; silicon for breast transplant would be soon over.

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

    It involves the production of special sex cells, called gametes, which fuse together to produce a new organism.

  2. 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.

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