Stas-Otto method A method of extraction of alkaloids from plants and animal bodies: the substance is digested in alcohol and tartaric acid, the fatty and resinous matters are precipitated with water, the fluid is made alkaline, and the alkaloids are extracted with ether or chloroform...
Control of Growth & Development tutorials look at how the genetic makeup determines the biological processes on a da..
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..
While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..
Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..
Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..
This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..
