Those plants which are on the extent of extinction that means on the point of extinct and once they become extinct they will remain as history to be studied in books. The plants are in this condition due to the fault and greed of mankind for their individual profit. Cutting down of forests, diseases in plants let the plants to be endangered which have adverse effects on the ecosystem.
Review articles are the summary of current state of understanding on a particular research topic. They analyze or discuss research previously published by scientist and academicians rather than reporting novel research results.Review article comes in the form of systematic reviews and literature reviews and are a form of secondary literature. Systematic reviews determine an objective list of criteria, and find all previously published original research papers that meet the criteria. They then compare the results presented in these papers. Literature reviews, by contrast, provide a summary of what the authors believe are the best and most relevant prior publications.
The concept of "review article" is separate from the concept of peer-reviewed literature. It is possible for a review to be peer-reviewed, and it is possible for a review to be non-peer-reviewed.
Last date updated on June, 2014