norefs date October 2009 Protobionts are systems that are considered to have possibly been the precursors to prokaryotic cell s. If RNA is trapped inside, the system can use the RNA or select for it. A protobiont is an aggregate of abiogenesis abiotically produced organic molecules surrounded by a membrane or a membrane like structure. Protobionts exhibit some of the properties associated with life , including simple reproduction , metabolism and excitability, as well as the maintenance of an internal chemical environment different from that of their surroundings. It has been suggested that they are a key step in the origin of life on earth. Experiments by Sidney W. Fox and Aleksandr Oparin have demonstrated that they may be formed spontaneously, in conditions similar to the environment thought to exist on an early Earth. These experiments formed liposome s and microspheres , which have membrane structure similar to the phospholipid bilayer found in cell biology cell s. Nanobe s or nanobacteria , being too small to be functional living organisms, may be an example of naturally occurring protobionts. See also Abiogenesis Prokaryote s Probiotic cells References reflist Origin of life Category Origin of life Category Molecular biology Biochem stub ca Protobiont de Protobiont es Protobionte fr Microgoutte ja pt Protobionte ru tr Eobiont ... more details
Expand list date August 2008 class wikitable style margin left 0.6em float right colspan 4 Greek alphabet colspan 4 Transliteration schemes Greek Traditional Classical Modern a a a b b v g g gh, y d d dh e e e z z, dz z e i th th th i i i c k k l l l m m m n n n x x x o o o p p p r r r s s s t t t y u i ph ph ph, f ch kh kh ps ps ps o o ae, e ai e, ai au au af, av i ei i eu eu ef, ev ng ng ng nx nx nx nc nk g, ng nch nkh nkh mp mp b, mb nt nt d, nd oe, e oi i u ou ou, u This is a list of Greek words with derivatives in English . The words are in Greek alphabetic order, with tables for the 24 Greek letters, listing thousands of related English words. id toc Contents Transliteration Transliteration Greek words with modern derivatives Greek Words with Modern Derivatives See also See also External links External links NOTOC Transliteration There are considerable differences between the various transliteration s used to represent the Greek alphabet in English Language English . The table in the sidebar shows The traditional transliteration, in other words that used in Latin , representing classical Greek this is the form in which most Greek words have made their way into English A classical transliteration, commonly used to represent more accurately the pronunciation of Ancient Greek, although traditional forms are rarely used. The modern transliteration often used for Modern Greek see transliteration of Greek into English for some variations. Rough breathing was represented in some Greek dialects by an h while in others, the h represented the vowel eta the origin of the sign is thought to be the left hand half of the letter H a rough breathing over an initial vowel or diphthong &ndash polytonic &ndash indicates that the word w ... more details
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