tetrahydrocannabinol (THC) [-hiâ²drÅkÉnabâ²inol] the active principle, occurring as two psychotomimetic isomers, in the hemp plant Cannabis sativa, used in the preparation of marijuana, hashish, bhang, and ganja. THC increases pulse rate and has variable effects on blood pressure.
Over the last 3.7 billion years or so, living organisms on the Earth have diversified and adapted to almost every environment imaginable. The diversity of life is truly amazing, but all living organisms do share certain similarities. All living organisms can replicate, and the replicator molecule is DNA. As well, all living organisms contain some means of converting the information stored in DNA into products used to build cellular machinery from fats, proteins, and carbohydrates. Three Domains of Life
Courtesy Science Nation/National Science Foundation. How did life on Earth begin? Itâs one of the biggest unanswered questions in science. Nicholas Hud and the Center for Chemical Evolution are breaking apart RNA and DNA to determine how the chains of chemicals that make life came together. DNA is the blueprint for building life, but RNA carries out the DNAâs instructions.