Classify the diversity of organism in different groups, Biology

Assignment Help:

Q. Classify the diversity of organism in different groups

• The goal of taxonomy is to develop a workable classification that reflects evolutionary relationships and provides identification and nomenclature.

• Species represent lineages produced by evolution and branching genetic relationship exists among the taxa of each group.

• Categories such as species, genera, families and orders are not rigid but are flexible and individually delimited for each group. Hierarchy is established by International Code of Botanical Nomenclature for plants and International Code of Zoological Nomenclature for animals.

• Taxa are based on the correlation of characters and discontinuities in the variation pattern. Any attribute of the plant animal may be selected as character and they do not have fixed value at all ranks.

• The selected character should be constant and must show little environmental variation for delimiting taxa.

• Taxa should be monophyletic. Taxonomic treatments should be practical and consistent in their use of the various categories.

• Taxa may resemble one another because of either convergence or parallelism.

• In the development of classification whenever possible, taxa should be sampled throughout their range and all taxa at lower ranks should be examined.

• Ancestral features and trends of diveFsity may often be recognised in the structure of living organisms.

• Ancestral organisms should be given careful consideration.

• Evolution may result in reduction or loss of parts which should also be taken into consideration.

• Morphological characters should be given proper importance because they provide guidance to primitive versus advanced features and aid in developing phylogenetic relationships. Thinking should be very flexible so that modifications in classification may be made as soon as new evidence is available.

• In phenetic taxonomy, taxa are organised and classified on the bases of similarities of the phenotypes of the organism.

• The modern taxonomy includes cladistic taxonomy which involves summarising knowledge about similarities among taxa in terms of a branching diagram called a cladogram depicting the hypothetical evolutionary histories of the organisms.

• Biogeography is also an important part of taxonomy because it analyses the pattern of distribution of organisms and relates these to the systematic of the organisms. Classification thus enables us to summarise our knowledge about the organisms, and that is one of the most important functions of taxonomy. The saving of time and effort is thus one way in which we can define the utility and purpose of classification.

Related Discussions:- Classify the diversity of organism in different groups

Explain the working of human visual system, Q. Which is the part of the hum...

Q. Which is the part of the human visual system where the receptors that sense light, i.e., the photoreceptor cells, are located? How do those cells work? The photoreceptor cel

Explain the advantages of double beam method, Explain the Advantages of Dou...

Explain the Advantages of Double Beam Method? The double beam method has advantage over single beam as it automatically corrects, for the change in light transmission, through

Glomerular filtrate in comparison to the blood, Q. What is the major transf...

Q. What is the major transformation presented by the glomerular filtrate in comparison to the blood? Glomerular filtrate is the name given to the plasma after it has entered th

Express krebs cycle photosystem ii, Calvin cycle electron transport chain g...

Calvin cycle electron transport chain glycolysis Kreb's cycle photosystem II.

Evolution of metazoa, Evolution of Metazoa The sponges, coming under p...

Evolution of Metazoa The sponges, coming under phylum Porifera are the closest to Protista, and can perhaps be regarded even as a colony of protists rather than being multicel

Define synthesis of hormones - vitamin c, Define Synthesis of Hormones - Vi...

Define Synthesis of Hormones - Vitamin C? Ascorbate is involved in the amidation, thereby conferring stability to hormones such as thyrotropin releasing hormone, adrenocorticot

J-shaped growth curve, J-shape d - It shows 2 phases - (i) Lay ph...

J-shape d - It shows 2 phases - (i) Lay phase (ii) Exponential phase

Agro industrial-zinc, Zinc Zinc regulates over a dozen important enzym...

Zinc Zinc regulates over a dozen important enzyme systems involved in metabolism of protein and carbohydrates. Zinc is also required for maintaining responsiveness of the immu

Explain soy protein concentrates - protein concentrates, Soy Protein Concen...

Soy Protein Concentrates The Association of American Feed Control Officials, Inc. (AAFCO) specifies soy protein concentrates as follows:  "Soy Protein Concentrate is organiz

Write Your Message!

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