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Phenetic ClassificationThis system is based exclusively upon face value of observed characters without direct reference to phylogeny. The taxa are either classified on the basis of a few characters or overall characteristics. When based on a few characters, the groupings are subjected to change on the discovery of natural affinities of the taxa,The greatest weakness in phenetic approach is that it demonstrates a false claim in establishing natural groups as products of the human mind rather than of evolution. It is now a well recognised fact for all natural taxa, especially species with their 'reproductive isolation, that they are not an arbitrary, subjective, man-made phenomena. This approach is quite useful for groups with immature classification and to those with numerous non-redundant characters. It is of no use when applied to higher organisms. The use of computer methods of pheneticists can be of great help in taxonomy if combined with philosophy of evolutionary taxonomy together with a the proper weighting of characters.
Freshwater Animals In Figure you have seen that the body fluids of freshwater animals are hyperosmotic to their aqueous surroundings. This results in two-kinds of osmotic prob
NEO DARWINISM OR SYNTHETIC THEORY OF EVOLUTION - It is the synthesis of the ideas of Neo Darwinians as a new theory of evolution based upon recent findings of genetics and m
Q. What are the major purposes of the organic molecules for living beings? Organic molecules, like, lipids, carbohydrates and proteins perform several functions for living orga
Which term is used to describe organisms that live on or in the bottom of an ocean or lake. Such organisms can be found anywhere from the shoreline to greatest ocean depths? a)
Explain Transposition the Great Arteries with Ventricular Scptal Defect ? Transposition of the great arteries with VSD is an indication for surgery. It is preferable to do VSD
Why do we need a family of proteins for cell adhesion (what is the advantage of having a family of proteins?)
Define Hydration Properties of Proteins? General conformation of individual proteins in solution is largely dependent on the interaction with water. The progressive hydration o
respiratory system in amphibains
Define Heart Diseases - excessive fat intake? Heart diseases show strong links to fat and cholesterol intake. Foods rich in cholesterol are of animal origin and given in Table.
why is blood called a fluid connective tissue ?
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