Nature is beautiful. Nature is endured with various plants, which are of tremendous help to human being. In the past, almost all the medicines used were from the plants, the plant being man s only chemist from ages.Historically, the majority of the natural product-based drugs were first discovered by traditional cell-based in vitro assays before their real molecular biological targets were identified. Thus most traditional cell-based in vitro assays can be viewed as detection methods of the fundamental and unique phenomena of living organisms. Large number of medicinal plants has been...