The base of the Mesozoic is established by what major event in the history of life on Earth? A.A mass extinction 251 million years ago B.The formation of a super-continent C.An increase in biodiversity D.None of these Answer and Feedback Answer:A do you want? view more test Xem thêm Share this post Some other questions you may be interested in. A standard, incandescent light bulb emits light when a filament is heated. How does a fluorescent bulb work? Who made the first flashlight? In 1793 Claude Chappe made the first system of communicating over long distances via flags. What word refers to such a system? Samuel F. B. Morse invented the telegraph key. What did Ivan Getting and Bradford Parkinson develop? Which of the following was introduced by the Western Union Compnay in 1933? Who had the great idea of putting a bell on the telephone so people would know that someone was calling? Which statement is true about the Regency? Which of these was an invention of Charles Strite? The elograph, which was invented in 1971, was the basis of what device?
