Describe cluster analysis, Biology

Assignment Help:

Q. Describe Cluster analysis?

After making a similarity table, it is then rearranged so that OTU's whose members have the highest mutual similarity are brought together. This can be done by several methods and related taxas or groups are recognised. These clusters are called phenons and can be arranged hierarchically in a tree diagram or dendrogram.

1407_Describe Cluster analysis.png

The groups or clusters thus recognised may be treated as equivalent to the categories having ranks in classical taxonomy, such as the genus, family, order, etc. A problem faced by many taxonomists is whether there is any equivalence between the ranks in different taxonomic groups of organisms. Is a family of flowering plants, for example equivalent in any sense to one of algae, or other organisms? To overcome this problem, numerical taxonomists have advocated a new terminology. Here, the tern "phenon" is introduced and the particular phenons are designated by numerical prefixes (e.g. 80 similarity) showing the level of. resemblance by which they are defined. The delimitation of the phenons is done by drawing horizontal lines across the dendrogram at a chosen similarity value. Such a dendrogram will have reference to a given study only, and cannot be generalised. Thus, phenons will be arbitrary and relative to groups within the limits of only one analysis.


Related Discussions:- Describe cluster analysis

How is the fluid that fills the nucleus called, The aqueous fluid that fill...

The aqueous fluid that fills the nuclear region is known as karyolymph, or nucleoplasm. In the fluid there are proteins, enzymes and other significant substances for the nuclear me

Platyhelminthes - regeneration in invertebrates, Platyhelminthes (Flatworms...

Platyhelminthes (Flatworms) - Regeneration in Invertebrates Between flatworms the turbellarians, (mostly fresh water species and fresh water and terrestrial triclads) routinel

Wigs and hairs - seed appendages, Wigs and hairs - Seed Appendages Se...

Wigs and hairs - Seed Appendages Seeds of certain plants have epidermal outgrowths or the integuments themselves may form folds and projections that present a wing-like appea

Define the term - lateralisation and localisation, Define the term - latera...

Define the term - lateralisation and localisation Discriminative validity studies including lateralisation and localisation achieved satisfactory results, but the localisation

Importance of counselling for diabetic patient, Q. Importance of counsellin...

Q. Importance of counselling for diabetic patient? Diabetes is a life-long illness. Life style modification and precautions taken by the patient can prevent complications and i

Explain procedure for preparation of general purpose media, Explain the Pro...

Explain the Procedure for Preparation of General Purpose Media Procedure: Now prepare the media following the steps enumerated herewith: 1. Weigh and dissolve each ingredien

Processed chicken products, P r o c esse d Chicken Products Prepar...

P r o c esse d Chicken Products Preparation of comminuted meat products is the best way to salvage meat from spent hens and broiler parent stock. Incorporation of whole eg

Why is ridge mapping required, Why is ridge mapping required and what is it...

Why is ridge mapping required and what is its alternative The selection of the implant diameter apart from the mesiodistal space available also depends on the buccolingual widt

Enzymes, The Biological Catalysis Enzyme: Biological catalysis  are cal...

The Biological Catalysis Enzyme: Biological catalysis  are called enzyme. An enzyme can be defined as an organic  substance that tremendously accelerates a chemical  reaction w

How occlusal load affect osseointegration, Q. How Occlusal load affect osse...

Q. How Occlusal load affect osseointegration? Overloading the recognizing bone tissue prematurely will cause failure of osseointegration. A two stage surgery is advised routine

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd