Rheumatoid Arthritis Symptoms In Women. Disorder that is believed to result from an autoimmune process in which the body's immune system attacks itself. It is a system-wide disease that usually last for many years. In some patients, RA affects such organs as the heart, lungs, and eyes.
The first organic molecules formed about 4 billion years ago. This may have happened when lightning sparked chemical reactions in Earthâs early atmosphere. RNA may have been the first organic molecule to form as well as the basis of early life. Explore More Use the time slider in this resource to answer the questions that follow.
August 2016 - RNA was probably one of the earliest steps towards life on Earth. RNA is short for ribonucleic acid, which is a very long, complicated molecule made out of amino acids linked together. The amino acids are made out of atoms of carbon, hydrogen, and a few other elements. If this is right, then the beginning of life on earth would look something like this.