Pre-University Paper from the year 2014 in the subject Biology - Cytology, grade: 15 Punkte = 1,0, language: English, abstract: All living things have to die. This fundamental truth is held to apply even to the smallest unit of life - cells. However, there is a phenomenon that is sometimes called biological immortality. It refers to cells that live beyond their proclaimed life span, which is roughly set by the Hayflick limit. All cancer cells have acquired this property; they divide indefinitely, which is the essential problem with cancer cells. On the other hand, researchers are very much...