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...
The movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..
The hominid family diversified from the apes around 6 to 8 million years ago. Since then, the evolutionary path has prov..
This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..
Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..
This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..
Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..
