Introduction
Selected article -The RNA world is a hypothetical stage in the evolutionary history of life on Earth, in which self-replicating RNA molecules proliferated before the evolution of DNA and proteins. The term also refers to the hypothesis that posits the existence of this stage. Alexander Rich first proposed the concept of the RNA world in 1962, and Walter Gilbert coined the term in 1986. Alternative chemical paths to life have been proposed, and RNA-based life may not have been the first life to exist. Even so, the RNA world hypothesis seems to be the most favored Abiogenesis paradigm, but even proponents agree it still has not reached conclusive evidence to completely falsify other paradigms and hypotheses. The concurrent formation of all four RNA building blocks further strengthened the hypothesis. Regardless of its plausibility in a prebiotic scenario, the RNA world can serve as a model system for studying the origin of life.
General images -The following are images from various evolutionary biology-related articles on Wikipedia.
Selected picture -Tarbosaurus at the Naturkundemuseum Münster in Münster, Germany. Did you know... -
CategoriesSelect [►] to view subcategories
Related portalsRelated subjectsTopics in biologyTasks you can do
Related topicsWikiProjectsWikiProjects connected with biology: A complete list of scientific WikiProjects can be found here. See also Wikispecies, a Wikimedia project dedicated to classification of biological species. Associated WikimediaDiscover Wikipedia using portals |