Previous Classification Systems’ Historical Limitations
The previous classification system was basically based on some facts that adopted by scientist to solve the classification of biological organisms effectively and efficiently. But, in the previous classification systems, there were some historical limitations that led to and solved by the three domain system that is used today. The historical limitations were basically concerned with lack of proper information about the cell structure discoveries, as well as based on only five kingdom systems of the organisms (Freedman, 2006). Further, the other historical limitations were absence of knowledge of the type of cell of the organisms and the main fact that help to classify the organisms.
Additionally, the lack of recognition about the similarities and differences among organisms were also some consequences of evolutionary mechanisms in the historical point of view. All these historical limitations were the main points of the previous classification systems. These limitations solved by Carl Linnaeus in 1958 through giving three domain systems.
Gene Coding for Ribosomal RNA
The gene coding for ribosomal RNA is the most important part in the biological science to establish the phylogenetic relationships of the organisms. Basically, it helps about the measurement of the evolutionary distances among organisms to easily differentiate for classification in appropriate taxa (Clarridge, 2004). It also helps to recognize all the species to keep them in the appropriate Kingdome and phylum under phylogenetic relationships. In comparison of the previous methods for placing organisms in appropriate taxa, it establishes a base for better understanding.
Further, the gene coding ribosomal RNA also helps as analysis of gene sequence for better identification of poorly and rarely described organisms on the earth. The gene coding ribosomal also impact with potential contributions in establishing phylogenetic relationships between different organisms (Clarridge, 2004). This system compares through previous methods by placing organisms in appropriate taxa with the help of the sequence of the gene of the organisms to find accurate result in every step of the classification system.
Factors that Limit the Ability
The classification and understanding of microbial diversity are the difficult task for the scientist because of the different types of its cell structure and millions of bacterial cells on the earth. Additionally, changing cell structure of various microbes in different environment limit the ability to fully classify and understand its nature (Lett, 2010). Further, the different function of microbial communities and habitat area also limits the ability to fully classify the microbial diversity.
The most of the implications that concerned with these challenges of environment and health management is the development of microbes in different conditions and ability to make ill of the people through easily entering into the human body (Lett, 2010). Further, the size of the microbes is also the main implications for environmental and health management to recognize easily and correctly. Additionally, the living nature of microbes inside the body has also implications that provide challenges to environmental and health management to recognize easily.
Clarridge, J.E. (2004). Impact of 16S rRNA Gene Sequence Analysis for Identification of Bacteria on Clinical Microbiology and Infectious Diseases. Retrieved from: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC523561/
Freedman, J. (2006). The Applications and Limitations of Taxonomy (in Classification of Organisms): An Anthology of Current Thought. USA: The Rosen Publishing Group.
Lett, E. (2010). An integrative approach to understanding microbial diversity: from intracellular mechanisms to community structure. Retrieved from: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3069490/